Sandoval: US must maintain presence in Afghanistan --- RENO, Nev. (AP) -- Nevada Gov. Brian Sandoval says the U.S. must continue to maintain a presence in Afghanistan to ensure security and prevent the Taliban from regaining a foothold. -- Sandoval, one of four U.S. governors who made a weekend visit to Afghanistan, said Sunday it's important for the U.S. to play an advisory role after the withdrawal of foreign combat troops by the end of the year. -- The Republican governor, in a conference call with reporters from Kabul, says he's impressed by progress made since his last visit to Afghanistan in 2011 and he thinks Afghan government forces are "well positioned" to face insurgent attacks. -- Afghanistan's new president, Ghani Ahmadzai, is expected to sign a security agreement that allows some 10,000 U.S. troops to remain in Afghanistan after all combat troops are withdrawn - Associated Press