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Since it is the impact point for the bomb, it is, of course, the point of highest damage. Around that spot are drawn concentric circles showing how far out from the impact point the circle is.

The term has chiefly come to be associated with nuclear explosions, but is also used for earthquakes, epidemics and other disasters.

It was military slang used at the Trinity site where the weapon tower was at point 'zero' and moved into general use very shortly after the end of World War II (see nuclear weapons).

1 World Trade Center

2 Other uses

The term is also used by members of the U.S. armed forces to describe the open space at the center of The Pentagon, in a blackly humorous reference to the likelihood of its being a nuclear weapons target in any nuclear war.

There is also a film named Ground Zero . This film is about a documentary filmer who gets into trouble after filming at a site in AustraliaAustralia is the sixth-largest country in the world (geographically), the only one to occupy an entire continent, and the largest in the region of Australasia. Australia includes the island of Tasmania, which is an Australian State. Its neighbouring count used by the United KingdomThe United Kingdom of Great Britain and Northern Ireland is a state in Western Europe, usually known simply as the United Kingdom the UK Britain or less accurately as Great Britain . The UK was formed by a series of Acts of Union which united the formerly for nuclear tests using aboriginal population as guinea pigCavia porcellus Cavia aperea Cavia tschudii Cavia guianae Cavia anolaimae Cavia nana Cavia fulgida Cavia magna Guinea pigs (also called cavies are rodents belonging to the family Cavidae and the genus Cavia''. Currently there is a scientific dispute as tos.

There is a song called "Christmas at Ground Zero" By Weird Al Yankovic on his fourth album

3 External links

• Step by step scenario of a 150 kiloton bomb exploding in Manhattan - click on the Next >> button at the bottom of each slide.
• The destructive forces unleashed - a U.S. physics professor has calculated the amount of energy released in the hijack attacks on the World Trade Center in New York.