From ABC News

Afghanistan updates: Another 1K US troops heading to Kabul, bringing total to 6,000

Another 1,000 soldiers from the Army’s 82nd Airborne have been ordered to head directly to Afghanistan’s capital instead of Kuwait to assist in the evacuation of U.S. personnel and Afghans who assisted the U.S. mission, a U.S. official told ABC News.

That brings the total number of U.S. troops being sent back to Afghanistan to 6,000.