http://www.businessinsider.com/general-james-mattis-aspen-security-forum-2013-7
Retired Marine General James N. Mattis gave an insightful talk to a packed crowd at the Aspen Security Forum on Saturday.
The general told Blitzer the military "is not worn out" and can carry out any mission, but "we should not fight wars without a clearly defined end state ... when you go to war, it can't be a half-step" — meaning, you have to be fully committed to winning.
Although he didn't directly address having a timeline to leave (as is the case of a 2014 Afghanistan pullout), Mattis said that you "don't ever tell the adversary in advance what you're not going to do."
Mattis also warned that Admirals and Generals need to "stop sucking their thumbs and whining about sequestration, telling the world we're weak" because it sends a signal to nations such as Iran and North Korea, and they may start to believe it.