"........how much more can we give treasure and blood?"

In an emotional exchange with Rep. Walter B. Jones, R-N.C., Petraeus said, "if I ever felt that we couldn't achieve our objectives," he would be "very forthright" not only with his superiors in the military chain of command but also with President Obama and members of the Congress.

Noting that Obama has said the U.S. will have combat troops out by the end of 2014, with the Afghan government in position to provide its own security, a skeptical Jones said he could imagine a senior military leader coming before Congress in 2015 and pleading for more time and more sacrifice.

"You know, 15, 16, 17 years, for God sakes, how much more can we take, how much more can we give treasure and blood?" Jones asked.

Petraeus replied: "I may not be at this table, probably won't be, in 2015, but I'll tell you that my son is in uniform, and Lieutenant Petraeus just completed a tour in Afghanistan, which thankfully we were able to keep very quiet, and left in November after serving as an infantry platoon leader. We're very proud of what he did. He thinks he was doing something very important."