Obama visits Afghanistan

Under cover of darkness and deep secrecy.

Barack Obama arrived unannounced in Afghanistan on Sunday, his first visit to the war zone that could define his presidency since his election as U.S. commander-in-chief.

Air Force One landed in darkness at Bagram airfield north of the Afghan capital, and Obama was whisked by helicopter to Hamid Karzai's palace in Kabul, where he was greeted by the Afghan president and a band playing the U.S. national anthem.      read on