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 simplicity, answers should be in all lower cased letters.

Q: Category: THE BIG BANGLADESH 
Clue: The green on the flag of Bangladesh represents its lush vegetation; the red circle in the middle is this

A: the sun
****
Q: Category: SONGS 
Clue: The title song in an Elvis film, it was written for the 1937 Bing Crosby film "Waikiki Wedding"

A: blue hawaii
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Q: Category: EXPLORERS 
Clue: This first American to orbit the Earth shot down 3 MIGs during the Korean War

A:
john glenn
****