airfields, the terrains, sites and installations necessary to her." It was because of this stipulation that France was able to continue nuclear testing in Algeria until 1966. With the underground tests the sequence designation was changed to jewel names, starting in November 1961 with Agate (<20 kt). On 1 May 1962, during the second test, the Béryl incident occurred, which was declassified many years later. Five months after the last Gerboise A-bomb, the Soviet Union responded by breaking its atmospheric tests moratorium, settled de facto since late 1958 with the United States and the United Kingdom. The USSR conducted many improvement tests, starting in September 1961 with a series of 136 large H-bombs. The series included the most powerful bomb ever tested, the 50-megaton (50,000 kt) "Tsar Bomba", which was detonated over Novaya Zemlya. Following the USSR, the United States reactivated its own atmospheric test program with a series of 40 explosions from April 1962 to November 1962. This series included two powerful H-bombs topping 7.45 Mt and 8.3 Mt. China also launched its own nuclear program, resulting in the A-bomb "596" (22 kt) tested on 16 October 1964, and the H-bomb Test No. 6 (3.3 Mt), tested 17 June 1967. In 1968, France detonated its first thermonuclear weapon, Canopus (2.6 Mt), at the new facility at Fangataufa, a desert atoll in French Polynesia. All other French atomic-bomb tests, including Canopus, were carried out in French Polynesia from 1966 to 1996. The last bomb, Xouthos (<120 kt), was detonated on 27 January 1996. See also List of nuclear weapons tests of France. International reactions In France, the news of Gerboise Bleues success was generally met with satisfaction and national pride. President De Gaulle stated:{{cquote|Hurray for France! Since this morning, she is stronger and prouder.Il y a cinquante ans, la France réalisait son premier essai nucléaire, Jean-Dominique Merchet, Libération, 13 February 2010 }} However, the nation faced many international critics following the nuclear test, especially from Africa. Just days after the test, all French assets in Ghana were frozen, "until such time as the effects of the present explosion and the future experiments referred to by the French Prime Minister become known." Morocco, which lays claim to the portion of the Sahara where the bomb was detonated, withdrew its ambassador from Paris just two days after the event. Other African nations expressed their disappointment with France's decision to test nuclear weapons