Displays of National Idiocy and Bluster.

Tsar Bomba (Russian: Царь-бомба, literally "Emperor-bomb") is the Western name for the largest, most powerful nuclear weapon ever detonated. Developed by the Soviet Union, the ~50 megaton bomb was codenamed Ivan (Russian: Иван) by its developers.

The bomb was tested on October 30, 1961 in Novaya Zemlya, an island in the Arctic Sea. The device was scaled down from its original design of 100 megatons to minimize nuclear fallout.

The term "Tsar Bomba" harkens to the historical Russian practice of building impractically large things as shows of power or prowess, e.g., a massive bell (Tsar Kolokol), the world's largest cannon (Tsar Pushka), and the unwieldy Tsar Tank. Although the bomb was so named such by Western sources (the strictly anti-monarchist Soviet Union would not have named this symbol of national pride in honor of its past rulers), the name is now widely used in Russia.
-http://en.wikipedia.org/wiki/Tsar_Bomba