OCCUPATION: General, U.S. Central Command chief
PREVIOUS APPEARANCES ON THE TIME 100: 1
PRO: He was a key architect and implementer of the surge in Iraq, which many credit with reducing sectarian violence and civilian casualties. Now he has turned his attention to Afghanistan and Pakistan and, some conservatives hope, a possible 2012 presidential bid.
CON: Troops are already stretched thin, and the public is weary of entering into another drawn-out war.