Responding to a question from HASC Ranking Member Buck McKeon (R-Calif.), Petraeus said that yes, he supports the July 2011 date as the beginning of a process. But, he complained, that date was based on a projection from last Fall. He said we'll do everything humanly possible (well, everything humanly possible within the constraints of a brutal, costly strategic frame that's not working) to achieve those conditions. When asked by McKeon whether July 2011 was based on conditions and not just a date on the calendar, he said, "That's correct." And, when asked whether he'd recommend delaying the withdrawal if those conditions didn't materialize, he confirmed it.
America, get ready for this excuse:
"Well, we tried, but it's just not possible for us to keep President Obama's promise to start a withdrawal this month." --General David Petraeus, July 2011.
Translation: the US is never getting out of Afghanistan!