I thought this was a hoax, but apparently it is true:

The proposal came from the Air Force’s Wright Laboratory in Dayton, Ohio, which requested $7.5 million to develop a so-called "gay-bomb." Using the Freedom of Information Act, Edward Hammond, director of the U.S. office of the Sunshine Project, obtained a copy which was "part of a military effort to develop non-lethal weapons." If completed, the bomb would release a chemical aphrodisiac "and by virtue of either breathing or having their skin exposed to this chemical… soldiers would become gay." This would cause their units to break down as the troops "became irresistibly attractive to one another."

Fortunately, smarter heads prevailed and the Air Force project never took off.

Hmmmm.  I wonder if it was a guided bomb, operating on gay-dar…..

Kind of sounds like a bad bad movie.  Oh, wait, it WAS a bad bad movie.  Sort of.