President Obama is planning to leave 9,800 U.S. troops in Afghanistan after the U.S. ends its combat mission this year, but will quickly cut that number roughly in half by the end of 2015, a senior administration official said Tuesday. Obama plans on consolidating U.S. troops in Kabul and at the Bagram Airfield. Under the plan, by the end of 2016 the U.S. will draw down to “a normal embassy presence with a security assistance office in Kabul, as we have done in Iraq,” the official said. Obama pays secret visit to U.S. troops in Afghanistan Christi Parsons, Kathleen Hennessey President Obama swooped into the Afghan war zone for a secret, rare visit with troops Sunday and renewed a…