Number of troops Obama's sending to Afghanistan back up to 34,000

The new deployments, along with 22,000 troops he authorized early this year, would bring the total U.S. force in Afghanistan to more than 100,000, more than half of which will have been sent to the war zone by Obama.

The president also plans to ask NATO and other partners in an international coalition to contribute 5,000 additional troops to Afghanistan, officials said. The combined U.S. and NATO deployments would nearly reach the 40,000 requested last summer by U.S. Gen. Stanley A. McChrystal, the coalition commander in Afghanistan, as part of an intensified counterinsurgency strategy.

The new troops are to be sent in stages beginning in January, with options to delay or cancel deployments, depending on the performance of the Afghan government and other factors.