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.

Category: HALOGENS 
Clue: A reddish liquid, this halogen is often used to make sedatives & was once used to make EDB, an additive in lead gasoline
bromine

Category: "FOOL"ISH SONGS 
Clue: This question precedes "Who never fell in love, it seems that I'm the only one that I have been thinking of"
"what kind of fool am i?"

Category: THE U.S. COAST GUARD 
Clue: The USCG has reach--a PSU went to protect Navy ships after the 2000 attack on the USS Cole in this Mideast country

yemen