see http://www.nti.org/e_research/profiles/Israel/Nuclear/3635_5223.html

This annotated chronology is based on the data sources that follow each entry. Public sources often provide conflicting information on classified military programs. In some cases we are unable to resolve these discrepancies, in others we have deliberately refrained from doing so to highlight the potential influence of false or misleading information as it appeared over time. In many cases, we are unable to independently verify claims. Hence in reviewing this chronology, readers should take into account the credibility of the sources employed here.
Inclusion in this chronology does not necessarily indicate that a particular development is of direct or indirect proliferation significance. Some entries provide international or domestic context for technological development and national policymaking. Moreover, some entries may refer to developments with positive consequences for nonproliferation.
26 February 1990
In a question and answer session with members of the Conference of Presidents of Major American Jewish Organizations, Deputy Foreign Minister Shimon Peres makes a public remark about Israel’s nuclear program, referring to it as strategic asset. He says: “We have everything that a small nation can have. Tell me, are there any other countries that produce a plane of our own, a missile of our own, and tank of our own, a missile boat of our own?” He adds that, “we have something in Dimona which is called textile industry.”
—”Peres Makes Rare Reference to Israeli Nuclear Program,” Associated Press, 26 February 1990.
January 1991
Israel goes on nuclear alert once during operation Desert Storm. Hundreds of nuclear warheads are armed in response to Iraqi Scud missile attacks against Israel.
— “Persian Gulf war: The revised version of the ‘mother of all battles’ was a dud. So, it turns out, was the coverage,” Toronto Star, 26 February 1994; see also Hersh, Seymour, The Sampson Option (New York: Random House, 1991).
17 February 1991
Iraq claims to have carried out “destructive strikes” against the town of Dimona with three missiles. Israeli officials report that one missile landed in the Negev desert, but refuse to say if the Dimona reactor is the target.
—”Iraq Says It Aimed Missiles at Israeli Reactor; Says Allies Face Defeat,” Associated Press, 17 February 1991; “The Gulf War: Nuclear Plant is Targeted by Iraq,” The Guardian (London), 18 February 1991.
25 February 1991
Iraq fires two SCUS missiles at Israel, one of them landing in the Negev desert region. Israeli officials report that the missiles caused no damage.
—”Iraq Lobs Two Scuds at Israel,” United Press International, 25 February 1991, “The Week That Was,” The Jerusalem Post, 28 February 1991.
29 May 1991
American President George Bush proposes an initiative to create a nuclear weapons free zone in the Middle East. The proposed initiative, involving all permanent members of the United Nations Security Council, would also discontinue the sale of all non-conventional weapons to Middle Eastern states and would subject all nuclear facilities to International Atomic Energy Agency inspections.
—”Bush Wages War on Arms Race,” The Times, 30 May 1991.
24 October 1991
The New York-based journal Nucleonics Week reports that a fire broke out in at the Dimona reactor. Israeli officials deny the charge.
—”Americans Cry ‘Fire’,” The Jerusalem Post, 24 October 1991.
December 1991
Israel returns 10.5 tons of heavy water to Norway, exactly half the amount if purchased in 1959 and 1971. Israeli officials say that the remaining 10.5 tons have been lost through waste and evaporation over the years.
—”Israeli Heavy Water Returned to Norway,” Agence France Presse, 3 December 1991, Stanghelle, Harold, “Israel to Sell Back 10.5 Tons.” Arbeiderbladet, Oslo, Norway, 28 June 1990 in: Center for Nonproliferation Studies, “Nuclear Developments,” 28 June 1990, 34-35; online, Internet 22 November 1998, .
5 January 1993
The Egyptian Al-Sha’b newspaper alleges that Israel is increasing the capacity of the Dimona reactor in order to increase the yield of plutonium separation units.
—”Egyptian Paper Claims Israel Increasing Capacity of Dimona Nuclear Reactor,” BBC Summary of World Broadcasts, 8 January 1993.
9 June 1993
Israeli authorities take a group of journalists and environmentalists on a tour of the site adjacent to the Dimona facility to quell rumors that it is leaking contaminants into the surrounding environment.
—”Tour Given in Area of Usually Off-Limits Nuclear Reactor,” Associated Press, 9 June 1993.
26 January 1994
Former Soviet KGB agent Yuri Linov reveals that he had penetrated Israel’s top secret nuclear laboratories He claims that he entered Israel disguised as a Jewish immigrant from Austria in 1968. For five years he operated a ring of agents, including informants working at the reactors at Dimona and Nachal Soreq, but discovered, he believes, “nothing new.”
—”Ex-KGB Spy Says He Penetrated Israel’s Top Secret Nuclear Facilities,” Associated Press, 26 January 1994; “KGB Nuclear Spy Details Add to Israel Security Fears,” The Times, 27 January 1994.
27 January 1994
Israel invites Egyptian scientists to visit Dimona to verify that there is no basis to rumors about environmental damage caused by the reactor. Israeli officials accuse the Egyptian government of spreading rumors of radiation leaks for political reasons.
—”Israel Invites Egypt to Check Radioactivity at Dimona Reactor,” Agence France Presse, 27 January 1994.
November 1994
Jane’s Intelligence Review estimates in its November issue that Israel has 7 nuclear facilities and as many as 200 nuclear weapons in a detailed review based on satellite images of Israel. The report also indicates that Nachal Soreq is the installation where Israel conducts research on nuclear weapons design and claims that nuclear weapons are assembled at a facility in Yodefat.
—”Jane’s: Israel Has 7 Nuclear Facilities, Up to 200 Nuclear Weapons,” Associated Press, 18 November 1994; Cirincione, Joseph with Wolfsthal, Jon B. and Rajkumar, Miriam, Deadly Arsenals, Tracking Weapons of Mass Destruction (Washington DC, Carnegie Endowment for International Peace, 2002), 224-225.
24 February 1995
A New York Times article reports on deteriorating relations between Israel and Egypt over recent Egyptian pressure on Israel to sign the NPT.
—”Dispute Over Nuclear Treaty Is Souring Relations Between Israel and Egypt,” The New York Times, 24 February 1995.
26 February 1995
A Saudi newspaper reports that Israeli Foreign Minister Shimon Peres refuses to grant the Egyptian Foreign Minister Amr Mussa access to the Dimona complex after prolonged Egyptian pressure to do so.
—”Peres Refuses Mussa Trip to Israeli Nuclear Plant: Report,” Agence France Presse, 26 February 1995.
31 March 1995
Shimon Peres states that Israel is ready to propose a Middle East free of nuclear weapons and missiles as soon as regional peace is assured.
—”‘Father’ of Israeli Atom Programme Proposes Nuclear-Free Middle East,” The Times, 31 March 1995.
23 December 1995
Israeli Prime Minister Shimon Peres says, “Give me peace and we’ll give up the nuclear program. That’s the whole story.”
—”Peres Says Israel, With Regional Pact, Would End Atom Effort,” The New York Times, 23 December 1995.
24 March 1996
The Israeli newspaper Ha’aretz reports that Israel is seeking public recognition by the United States government of its need for nuclear weapons. Such an acknowledgement would represent a drastic change in American policy.
—”Israel Wants U.S. Recognition of Need for Nuclear Weapons,” Associated Press, 24 March 1996.
7 April 1996
Syrian Ba’ath Party Assistant Secretary-General Abdallah al-Ahmar calls for Israeli nuclear facilities to be placed under international supervision.
—”Syria Wants Action on Israel Nuclear Power,” United Press International, 7 April 1996.
25 June 1996
Israel’s most widely circulated daily newspaper, Yediot Ahronot, publishes aerial photos of the Dimona reactor complex obtained via the U.S. Central Intelligence Agency. The images, acquired through loosened American information laws, are printed on the front page of the paper.
—”Secret Nuclear Reactor Photos Published,” United Press International, 25 June 1996.
25 July 1996
An article published in the Israeli newspaper Ha’aretz reveals two important aspects of the Israeli nuclear program. The piece reports that expenses for the Nuclear Research Centre in Dimona are paid for out of the defense budget and that Israel Defense Forces (IDF) soldiers serve in Dimona installations. The facts were revealed during a disagreement over the defense budget and salaries of IDF career personnel.
—”Budget Dispute Said to Reveal Defense Funding for Dimona Nuclear Centre,” BBC Summary of World Broadcasts, 26 July 1996.
25 February 1997
An Iraqi official confirms that Iraq targeted the Dimona nuclear complex with Scud missiles during the 1991 Gulf War. General Abderrazzak Al-Ayubi tells the Iraqi newspaper Al-Jumhuriyah that “ten Iraqi missiles were fired at hostile targets in Haifa, 28 on other targets in Tel Aviv, and five at Dimona.”
—”Iraq Tried to Hit Israeli Nuclear Plant During Gulf War,” Agence France Presse, 25 February 1997.
20 April 1997
The Israeli daily Ha’aretz reports that Former South African Deputy Foreign Minister Aziz Pahad confirms that the South African and Israeli governments helped each other develop nuclear weapons in the early 1980s. The article also quotes South African General Constand Viljoen as saying, “We wanted to get nuclear knowledge from whoever we could, also from Israel.”
—”Report: Israel Helped South Africa Develop Nuclear Weapons,” Associated Press, 20 April 1997.
June 1997
Prompted by allegations that an Israeli university collaborates in the Israeli nuclear weapons program, the United States bars American firms from having business ties with Ben Gurion University. The university allegedly used a U.S. supercomputer for nuclear arms research.
—”US Orders Boycott of Israeli University Over Alleged Nuclear Arms Link,” Agence France Presse, 12 June 1997.
30 July 1997
British-based Jane’s Intelligence Review publishes images indicating that Israeli missile facilities are susceptible to destruction by nuclear attack. The photos show that the Zachariah base southeast of Tel Aviv shows no sign of missile storage silos that can withstand a nuclear blast. These missiles are stored in limestone caves, which cannot be reinforced to provide adequate protection.
—”Jane’s: Photos Show Israel’s Nuclear Missile Base Vulnerable to Attack,” Associated Press, 30 July 197.
12 October 1997
An Israeli court awards compensation to a former Dimona plant worker suffering from cancer due to radiation exposure.
—”Court: Nuke Reactor Work Caused Cancer,” United Press International, 12 October 1997.
1997-1998
In a review of Israel nuclear strategy involving Prime Minister Netanyahu’s Office, the Ministry of Defense, and the Foreign Ministry, it is decided that Israel should keep its weapons of mass destruction and missiles secret, strengthen its missile defense, and reduce the vulnerability of its nuclear force.
—Cordesman, Anthony, Weapons of Mass Destruction in the Middle East, Center for Strategic and International Studies, 15 April 2003.
3 February 1998
Israel deploys four batteries of American Patriot anti-missile missiles on a hill in the southern Negev Desert near Dimona in response to public anxiety about Israeli preparedness for Iraqi-launched Scud missile biological weapons attacks.
—”Missiles Readied as Fears of Germ Attack Increase,” The Times, 3 February 1998.
19 February 1998
The Israeli newspaper Ma’ariv reports that Israeli scientists, in response to the U.S. ban on the export of supercomputers to the Israeli Nuclear Research Centre, have developed a “virtual supercomputer” to perform the same functions. Scientists at Israel’s Technion computer science department have clustered personal computers linked by a network to carry out supercomputer tasks.
—”‘Virtual Supercomputer’ Developed to Overcome US Ban,” BBC Summary of World Broadcasts, 24 February 1998.
13 March 1998
Mordechai Vanunu, convicted of revealing details of Israel’s nuclear program in 1986, is allowed to leave solitary confinement for the first time in 12 years, but remains in prison serving an 18-year sentence.
—”Israel End 12 –Year Solitary,” BBC News, 13 March 1998, .
11 May 1998
Israeli authorities reveal that they have been holding an Arab Israeli for eight years on charges of spying for Iraq. Munir Fathi Said is to be released early from his 13-year jail term for passing information on Israel’s nuclear program to Iraqi agents.
—”Israel Reveals It Has Been Holding Spy for Iraq Eight Years,” Agence France Presse, 11 May 1998.
1 June 1998
Egypt’s MENA news agency reports that Pakistan’s ambassador to Egypt, Tayyab Siddiqui, alleges that Israel has cooperated in India’s nuclear weapons program. He states that “neutral” sources inside Israel confirm this, but does not reveal those sources.
—”Envoy to Egypt Says Reports ‘Confirmed’ India-Israel Cooperation,” BBC Summary of World Broadcasts, 3 June 1998.
5 June 1998
Shimon Peres makes remarks alluding to Israel’s nuclear capability in a televised interview. On Israel TV’s Channel Two, Peres said that, “No one made a bomb to use it. Instead, we wanted a veiled nuclear option in order to prevent war.”
—”Peres Edges Close to Acknowledging Israel’s Nuclear Capability,” Associated Press, 5 June 1998.
17 June 1998
Israeli Deputy Defense Minister Silvan Shalom tells the Knesset that rumors of Israel having tested a nuclear device a month earlier are “absolutely without foundation.” Two members of the Knesset had claimed that the alleged test may have triggered an earthquake in the region.
—”Israel Denies Conducting Nuclear Test in May,” Agence France Presse, 17 June 1998.
14 July 1998
The website of The Jordan Times reports that former Israeli Prime Minster Shimon Peres acknowledges Israel’s nuclear weapons program. He is reported to have told an audience of academics and the media in Amman that, “We built a nuclear option, not in order to have a Hiroshima, but to have an Oslo.”
—”Israeli Labor Party’s Peres Acknowledges Israel Possesses Nuclear Weapons,” BBC Worldwide Monitoring, 14 July 1998.
11 August 1998
Although it does not commit to open the Dimona nuclear complex to international inspections, Israel opts not to veto motions to begin discussing a treaty to stop production of fissile material at the United Nations Conference on Disarmament in Geneva, according to The Jerusalem Post.
—”UN Nuclear Parley Begins After Israel Drops Veto,” The Jerusalem Post, 12 August 1998.
11 August 1998
The Israeli daily Ma’ariv reports that Israel will sign the treaty, which will include control and supervision mechanisms enabling international inspectors to visit the Dimona nuclear reactor. This decision was made by Prime Minister Benjamin Netanyahu after consulting with senior Defense and Foreign Ministry officials.
—”Paper: Israel Ready for Conditional Acceptance of Nuclear Supervision Treaty,” BBC Summary of World Broadcasts, 13 August 1998.
October 1998
Because of military censorship rules in Israel, Avner Cohen publishes his book Israel and the Bomb in the United States. The book gives detailed accounts of the development of Israel’s nuclear program and doctrine of nuclear ambiguity. While Cohen insists that he has done nothing to harm Israel’s security, he asserts that Israel armed two nuclear bombs on the eve of the 1967 war, that U.S. President Eisenhower turned a blind eye to the French-aided construction of Israel’s nuclear reactor, and that the only U.S. president to try to stop Israel’s proliferation was John F. Kennedy.
—”World: Middle East Book Breaks Israel’s Nuclear Taboo,” BBC News, 21 October 1998, .
October 1999
A secret document written by the U.S. Department of Energy claims that Israel possesses 300 to 500 kilograms of weapons-grade plutonium, enough to produce at least 250 warheads. This information was disclosed in the Bulletin of Atomic Scientists and on the front page of the Israeli daily Ha’aretz.
—”Israel Ranked Sixth Nuclear Power by US,” The Times (London), 9 October 1999.
24 November 1999
Israel releases 1,200 pages of testimony from the trial of Mordechai Vanunu, the nuclear technician serving an 18-year sentence for reveal details of Israel’s nuclear program. The documents give an account of Vanunu’s stated motives for his actions. Shimon Peres criticizes the release of the transcripts.
—”Vanunu Trial Extracts Published,” BBC News, 24 November 1999, .
25 November 1999
Israeli prison officials deny a newspaper report that Mordechai Vanunu passed bomb-making information to Palestinian security prisoners during walks in the prison yard.
—”Officials Deny Nuclear Informer Gave Bomb Formulas to Palestinian Inmates,” Associated Press, 25 November 1999.
25 November 1999
After it petitioned a court to allow publication, Israeli daily Yediot Ahronot publishes excerpts of the released portions of the trial of Mordechai Vanunu. In the published transcripts are allegations by Vanunu that he was beaten and kicked by Israeli interrogators after his abduction in Rome in 1986.
—”Vanunu Trial Details Released,” The Times (London), 25 November 1999.
If anyone even raises his hand against us we’ll take away half his land
and burn the other half, including the oil. We might use nuclear arms.