There's already a blueprint, but the longer action takes, the more expensive a withdrawal would become. Closing a military base takes about 10 months. Officials say they can do it in less time for more money. Afghan President Hamid Karzai has delaying signing the deal as his term in office ends. He says he wants his successor to sign the pact. It would keep up to 10,000 U.S. troops in Afghanistan. They would focus on counterterrorism and training Afghan security forces.