You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For consistency, answers should be in all lower cased letters.

[Q]: Category: LETHAL WEAPONS 
Clue: In the largest man-made explosion in history, the USSR detonated a 50-megaton one of these in 1961
[A]: a hydrogen bomb


[Q]: Category: CELEBRATED ON THEIR BIRTHDAYS 
Clue: Arbor Day in California, March 7
[A]: luther burbank


[Q]: Category: FILM STARS 
Clue: The drill instructor in "An Officer and a Gentleman", he turned down an offer to play pro basketball
[A]:
louis gossett, jr.