Washington, Rajab 26, 1435, May 25, 2014, SPA -- US President Barack Obama arrived in Afghanistan on Sunday in an unannounced visit to meet with American troops amid an ongoing drawdown of US combat forces in country. Air Force One landed at Bagram Air Field, the largest US military base in Afghanistan, at 8:17 pm (1547 GMT), after leaving Washington late Saturday, dpa reported. --SPA 21:15 LOCAL TIME 18:15 GMT www.spa.gov.sa/w