The Yossarian reference article from the English Wikipedia on 24-Apr-2004
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Yossarian

Captain Yossarian is the protagonist of the 1961 novel Catch-22 by Joseph Heller. He is a bombardier in the 256th squadron of the Army Air Force (which later became the US Air Force).

Yossarian is also the protagonist of Catch-22's sequel, Closing Time, published in 1994.

Yossarian's main concern in life is that people are trying to kill him, a justifiable qualm considering he is fighting a war. Because of this, Yossarian tries repeatedly to get grounded. His primary method is to feign either illness or insanity.