Monday: Afghan President Hamid Karzai is scheduled to visit Washington on Monday to discuss post-2014 security and economic assistance.

U.S. reduction plan: U.S. officials said Saturday that the Obama administration is considering keeping a force as small as 3,000 to 9,000 troops in Afghanistan after 2014, when NATO nations are set to hand over security to the Afghans. Gen. John Allen, the U.S. commander in Afghanistan, is said to have suggested 6,000 to 20,000 troops.

Future missions: Any U.S. force that remains will advise Afghan forces, carry out raids against Al-Qaida, support U.S. forces with such tasks as medical evacuations, and protect any NATO troops.