[geetrue]

I just found this site called Sonic Bomb:http://www.sonicbomb.com/modules.php...r=0&thold=0The

Tsar Bomba - The King of Bombs On October 30, 1961, the most powerful weapon ever constructed by mankind was exploded over the island of Novaya Zemlya in the Arctic Sea. The device was code-named "Tsar", a multi-stage hydrogen bomb built in only sixteen weeks by engineers in the USSR at the order of Soviet Premier Nikita Khrushchev.

The "Tsar Bomba" or "King of Bombs"– was originally designed to yield a 100 megaton explosion. However, the uranium tamper was replaced with a lead one, decreasing the yield to 50 megatons, this also eliminated much of the radioactive fallout generated by the test, and an almost certain doom for the release plane. The lead tamper also made the bomb the cleanest device ever made, with 97% of the yield coming from the fusion reaction. Even at the decreased yield, it was approximately 4000 times more powerful than the bomb which destroyed Hiroshima.