U.S. Ambassador to Afghanistan, Ryan Crocker speaks during a press conference at the U.S. embassy in Kabul, Afghanistan, Wednesday, May 2, 2012. Crocker told reporters on Wednesday that the signing of an agreement between Barack Obama and his Afghan counterpart Hamid Karzai was "the clearest statement" that America is "committed to a long-term presence" in the country. (AP Photo/Ahmad Jamshid)