Bugün öğrendim ki: ABD, atom bombasının müdahalesi konusunda işbirliği yaptıktan sonra, İngiltere'nin yaptığı gibi tüm araştırmalarını İngiltere ile paylaşacaklarına söz verdi. Ancak ABD imzaladığı anlaşmayı kaybetti ve sözünden döndü. Bu, İngiltere'nin nükleer silahları iki kez icat eden tek ülke olduğu anlamına geliyordu.
3rd country to develop nuclear weapons United Kingdom --- [![Location of United Kingdom](//upload.wikimedia.org/wikipedia/commons/thumb/5/5b/Europe- UK.svg/250px-Europe-UK. svg.png)](/wiki/File:Europe-UK.svg "Location of United Kingdom") Nuclear program start date| 10 April 1940 First nuclear weapon test| 3 October 1952 First thermonuclear weapon test| 15 May 1957 Last nuclear test| 26 November 1991 Largest yield test| 3 [Mt](/wiki/TNT_equivalent "TNT equivalent") (13 [PJ](/wiki/Joule "Joule")) (28 April 1958) Total tests| 45 detonations Peak stockpile| 520 warheads (1970s) Current stockpile| 180 warheads (2019) Current strategic arsenal| 120 warheads (2019) Maximum missile range| 12,000 kilometers (7,500 mi) ([UGM-133 Trident II](/wiki/UGM-133_Trident_II "UGM-133 Trident II")) [NPT](/wiki/Nuclear_Non-Proliferation_Treaty "Nuclear Non-Proliferation Treaty") party| Yes (1968, one of five recognized powers) In 1952, the [United Kingdom](/wiki/United_Kingdom "United Kingdom") became the third country (after the [United States](/wiki/Nuclear_weapons_of_the_United_States "Nuclear weapons of the United) States") and the [Soviet Union](/wiki/Soviet_atomic_bomb_project "Soviet atomic bomb project")) to develop and test [nuclear weapons](/wiki/Nuclear_weapons "Nuclear weapons"), and is one of the [five nuclear- weapon states](/wiki/List_of_states_with_nuclear_weapons