The Australian government formally agreed Agree_or_refuse_to_act to the islands being used Using as a nuclear test Research site in May 1951 .

Chagai-I is the code name of five simultaneous underground nuclear tests conducted Action by Pakistan at 15:15 hrs PST on 28 May 1998 .

Chagai-I was Pakistan 's first public test of nuclear weapons .

Its timing Deciding was a direct response Response to India 's second nuclear tests Testing , on 11 and 13 May 1998 .

By testing Testing nuclear devices , Pakistan became Becoming the seventh nation to publicly test Testing nuclear weapons .

By testing Testing nuclear devices , Pakistan became Becoming the seventh nation to publicly test Testing nuclear weapons .

Pakistan 's second nuclear test Testing , Chagai-II , followed Self_motion on 30 May 1998 .

Operation Crossroads was a pair of nuclear weapon tests Testing conducted Action by the United States at Bikini Atoll in mid-1946 .

They were the first nuclear weapon tests Testing since Trinity in July 1945 , and the first detonations of nuclear devices since the atomic bombing Attack of Nagasaki on August 9 , 1945 .

They were the first nuclear weapon tests Testing since Trinity in July 1945 , and the first detonations of nuclear devices since the atomic bombing Attack of Nagasaki on August 9 , 1945 .

The purpose of the tests was to investigate Research the effect of nuclear weapons on warships .

The Crossroads tests were the first of many nuclear tests held Hold in the Marshall Islands , and the first to be publicly announced Expressing_publicly beforehand and observed Perception_active by an invited audience , including a large press corps .

they were conducted Action by joint army/navy task force one , headed by vice admiral william h. p. blandy rather than by the manhattan project , which had developed Coming_to_be nuclear weapons during world war ii .

A fleet of 95 target ships was assembled Come_together in Bikini Lagoon and hit Attack with two detonations of Fat Man plutonium implosion-type nuclear weapons of the kind dropped on Nagasaki , each with a yield of .

The `` Baker '' test 's radioactive contamination of all the target ships was the first case of immediate , concentrated radioactive fallout from a nuclear explosion .

chemist glenn t. seaborg , the longest-serving chairman of the atomic energy commission , called Statement `` baker '' `` the world 's first nuclear disaster . ''

During the operation , two operatives sank Motion_directional the flagship of the Greenpeace fleet , the `` Rainbow Warrior '' , at the Port of Auckland in New Zealand on its way to a protest against a planned French nuclear test Testing in Moruroa .

Operation Dominic was a series of 31 nuclear test Testing explosions with a 38.1 Mt total yield conducted Action in 1962 by the United States in the Pacific .

The Thor missile was also used Using to lift Body_movement warheads into near-space to conduct Action high-altitude nuclear explosion tests Testing ; these shots Use_firearm were collectively called Name_conferral Operation Fishbowl .

Nikita Khrushchev announced Expressing_publicly the end Process_end of a three-year moratorium on nuclear testing Testing on August 30 , 1961 , and Soviet tests recommenced Process_start on September 1 , initiating Process_start a series of tests Testing that included Cause_to_be_included the detonation of Tsar Bomba .

it was the largest nuclear weapons testing Testing program ever conducted Action by the united states and the last atmospheric test series conducted Action by the u.s. , as the limited Limiting test Testing ban treaty was signed Sign_agreement in moscow the following year .

According to the prosecution 's claims in 2006 , Argentina had been targeted Aiming by Iran after Buenos Aires ' decision Deciding to suspend Change a nuclear technology transfer contract to Tehran .

Project Rulison , named Name_conferral after the rural community of Rulison , Colorado , was an underground 40-kiloton nuclear test project in the United States on September 10 , 1969 , about SE of the town of Grand Valley , Colorado ( now named Parachute , Colorado ) in Garfield County .

It was part of the Operation Mandrel weapons test series under the name Mandrel Rulison , as well as the Operation Plowshare project which explored Scrutiny peaceful engineering uses of nuclear explosions .

Operation Opera ( ) , also known as Operation Babylon , was a surprise Israeli air strike Attack carried out Military_operation on 7 June 1981 , which destroyed Destroying an Iraqi nuclear reactor under construction 17 kilometers ( 10.5 miles ) southeast of Baghdad .

The operation came Motion after Iran 's unsuccessful Operation Scorch Sword operation had caused Causation minor damage Damaging to the same nuclear facility the previous year , the damage Damaging having been subsequently repaired Reforming_a_system by French technicians .

Operation Opera , and related Israeli government statements following it , established Creating the Begin Doctrine , which explicitly stated Statement the strike was not an anomaly , but instead “ a precedent for every future government in Israel. ” Israel 's counter-proliferation preventive strike added Cause_to_be_included another dimension to their existing policy of deliberate ambiguity , as it related to the nuclear capability of other states in the region .

In 1976 , Iraq purchased Commerce_buy an `` Osiris '' -class nuclear reactor from France .

While Iraq and France maintained that the reactor , named Name_conferral `` Osirak '' by the French , was intended for peaceful scientific research , the Israelis viewed Perception_active the reactor with suspicion , believing it was designed Creating to make Manufacturing nuclear weapons .

The efficacy of the attack is debated Communication by historians , who acknowledge Statement that it brought Bringing back Iraq from the brink of nuclear capability but drove Bringing its weapons program underground and cemented Connect Saddam Hussein 's future ambitions for acquiring nuclear weapons .

The efficacy of the attack is debated Communication by historians , who acknowledge Statement that it brought Bringing back Iraq from the brink of nuclear capability but drove Bringing its weapons program underground and cemented Connect Saddam Hussein 's future ambitions for acquiring nuclear weapons .

the united states detonated Attack two nuclear weapons over the japanese cities of hiroshima and nagasaki on august 6 and 9 , 1945 , respectively , with the consent Commitment of the united kingdom , as required Imposing_obligation by the quebec agreement .

The two bombings Use_firearm killed Killing between 129,000 and 226,000 people , most of whom were civilians , and remain Presence the only use Using of nuclear weapons in armed Bearing_arms conflict .

the main target Aiming of the strike Attack was the tuwaitha nuclear research Research center near baghdad , which was the site of the osirak nuclear reactor that was attacked Attack by the iranian air force in 1980 and again by the israeli air force in 1981 , along with many other military sites across the city .

the main target Aiming of the strike Attack was the tuwaitha nuclear research Research center near baghdad , which was the site of the osirak nuclear reactor that was attacked Attack by the iranian air force in 1980 and again by the israeli air force in 1981 , along with many other military sites across the city .

The tsunami caused Causation nuclear accidents , primarily the level 7 meltdowns at three reactors in the Fukushima Daiichi Nuclear Power Plant complex , and the associated Motion evacuation zones affecting Influence hundreds of thousands of residents .

Many electrical generators were taken down , and at least three nuclear reactors suffered Catastrophe explosions Destroying due to hydrogen gas that had built Building up within their outer containment buildings after cooling system failure resulting Causation from the loss of electrical power .

Operation Sandstone was a series of nuclear weapon tests in 1948 .

The purpose Aiming of the Sandstone tests was also different : they were primarily tests of new bomb designs rather than of the effects of nuclear weapons .

Even before the third test had been carried out Action , production of the old cores was halted Process_end , and all effort concentrated Aiming on the new Mark 4 nuclear bomb , which would become Becoming the first mass-produced nuclear weapon .

Even before the third test had been carried out Action , production of the old cores was halted Process_end , and all effort concentrated Aiming on the new Mark 4 nuclear bomb , which would become Becoming the first mass-produced nuclear weapon .

More efficient use of fissionable material as a result of Operation Sandstone would increase the U.S. nuclear stockpile from 56 bombs in June 1948 to 169 in June 1949 .

Reflecting the Cold War tensions pandemic in late 1950s America , the enclosure – built of poured in place concrete and sprayed with pneumatically applied gunite – was advertised as having been built to withstand a nuclear attack .

project unk was an underground nuclear detonation carried out Action by the united states atomic energy commission on december 10 , 1967 in rural northern new mexico .

It was part of Operation Plowshare , a program designed to find Know peaceful uses for nuclear explosions .

Its purpose was to determine Deciding if nuclear explosions could be useful in fracturing rock formations for natural gas extraction .

Following the Project Gasbuggy test , two subsequent nuclear explosion fracturing experiments were conducted Action in western Colorado in an effort to refine the technique .

`` unk '' , c/n unk , carrying Bringing two nuclear weapons departed Departing from mather air force base near sacramento .

The aircrew ejected Removing safely , and then the unmanned aircraft crashed Catastrophe west of Yuba City , tearing the nuclear weapons from the aircraft on impact Influence .

The crew ejected Removing , the aircraft broke up Destroying and four onboard nuclear weapons were released .