title: Tsar Bomba
context: The Soviet RDS-220 hydrogen bomb (code name Ivan[3] or Vanya), known by Western nations as Tsar Bomba (Russian:Царь-бо́мба, tr.Tsar'-bómba,IPA:[t͡sarʲ ˈbombə],lit. 'Tsar bomb'), was the most powerful nuclear weapon ever created. Tested on 30 October 1961 as an experimental verification of calculation principles and multi-stage thermonuclear weapon designs, it also remains the most powerful explosive ever detonated. It was also referred to as Kuzma's mother (Russian:Ку́зькина ма́ть, tr.Kúz'kina mát',IPA:[ˈkusʲkʲɪnə ˈmatʲ]),[4] possibly referring to First secretary Nikita Khrushchev's promise to "show the United States a Kuzma's mother" (an idiom roughly translating to "We'll show you") at a 1960 session of United Nations General Assembly.[5][6]
question: What's the biggest atomic bomb to ever exist?
answers: The Soviet RDS-220