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: THE TOWER 
Clue: Lightning not only strikes the same place twice, it strikes this 110-story Chicago tower hundreds of times a year
sears tower

Category: POLITICS 
Clue: This New York City political boss served in the House of Representatives from 1853-55
boss tweed

Category: THE VIETNAM WAR 
Clue: Begun Jan. 21, 1968, the Battle for this Marine outpost may have been an NVA diversion before the Tet Offensive

khe sanh