instruction:
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.
question:
Category: FEDERAL PUBLIC SERVANTS 
Clue: With 7 years' service, this man who resigned in June 2004 had the longest tenure in his position in over 4 decades
answer:
george tenet


question:
Category: U.S. CITIES 
Clue: On May 24, 1844 Samuel Morse was in this city demonstrating his invention
answer:
washington, d.c.


question:
Category: SIGNS & SYMBOLS 
Clue: Created in 1970 & made up of 3 arrows, the universal symbol for this was based on the Mobius strip
answer:

recycling