Tsar Bomba (Russian: Царь-бомба; "Tsar of bombs") is the nickname for the AN602 hydrogen bomb, the most powerful nuclear weapon ever detonated. Its test on October 30, 1961, remains the most powerful man-made explosion in human history. It was also referred to as Kuz'kina Mat' (Russian: Кузькина мать, Kuzma's mother), referring to Nikita Khrushchev's promise to show the United States a "Kuz'kina Mat'" at the 1960 United Nations General Assembly.