Treachery has existed as long as there’s been warfare, and there’s always been a few people that you couldn’t trust.

In response to a question during a congressional hearing about whether the U.S. should modify its Afghan strategy in response to six U.S. soldiers being killed by Afghan soldiers between Feb. 23 and March 1. As quoted in "Key commanders have their say on Afghanistan" by Walter Pincus, The Washington Post (7 March 2012)