U.S. to keep about 10,000 troops in Afghanistan after 2014

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(CNN) — President Barack Obama is expected to announce on Tuesday that the United States plans to keep just under 10,000 troops in Afghanistan after this year, if the Afghan government signs a security agreement.

A senior administration official said that number would be cut by roughly half by the end of 2015, and the military would then transition to a smaller force built around embassy security operations at the end of the following year.

There currently are 32,000 American forces in Afghanistan, where the United States has fought its longest war.

Both presidential candidates in Afghanistan have indicated a willingness to sign the security agreement, if elected. However, the official said the United States would maintain no military presence after this year if for some reason that doesn’t happen.

Obama will give a foreign policy speech on Wednesday at the U.S. Military Academy at West Point, New York.

Up until now, his administration has been reluctant to assign a number to American troop strength in Afghanistan once the combat mission ends at year’s end. The U.S. mission after that will focus on training and counter-terror operations.