U.S. Secretary of State John Kerry's Afghanistan Trip

U.S. Secretary of State John Kerry meets with Afghanistan's presidential candidate Ashraf Ghani Ahmadzai at the U.S. Embassy in Kabul, July 11, 2014.

This image released by the Afghan presidential palace shows U.S. Secretary of State John Kerry talking with Afghanistan's President Hamid Karzai at the presidential palace in Kabul, July 11, 2014.

Afghan presidential candidate Abdullah Abdullah, center, shakes hands with U.S. Secretary of State John Kerry at the start of a meeting at the U.S. Embassy in Kabul, July 11, 2014.

This image released by the Afghan presidential palace shows U.S. Secretary of State John Kerry talking with Afghanistan's President Hamid Karzai at the presidential palace in Kabul, July 11, 2014.