WASHINGTON (AP) — The Obama administration says it might leave no troops in Afghanistan after December 2014, an option that defies the Pentagon's view that thousands of troops may be needed to contain al-Qaida and to strengthen Afghan forces.

"We wouldn't rule out any option," including zero troops, Ben Rhodes, a White House deputy national security adviser, said Tuesday.

"The U.S. does not have an inherent objective of 'X' number of troops in Afghanistan," Rhodes said. "We have an objective of making sure there is no safe haven for al-Qaida in Afghanistan and making sure that the Afghan government has a security force that is sufficient to ensure the stability of the Afghan government."