Article 8 of the Constitution - Time to bring our troops home from Afghanistan

I'm studying the Constitution. In Article 8 it reads " The Congress shall have Power To...

To declare War, grant Letters of Marque and Reprisal, and make Rules concerning Captures on Land and Water;

To raise and support Armies, but no Appropriation of Money to that Use shall be for a longer Term than two Years;" (Source http://www.archives.gov/exhibits/charters/constitution_transcript.html)

The goal of the War in Afghanistan was to disrupt the Taliban and seek out Osama Bin Laden.  We have been there 10 years. Both stated goals have been accomplished, isn't it time to bring our troops home?