IS threat forces US changes to evacuations at Kabul airport

Families evacuated from Kabul, Afghanistan, walk through a terminal Saturday before boarding a bus after they arrived at Washington Dulles International Airport, in Chantilly, Va. (AP Photo/Jose Luis Magana)

KABUL, Afghanistan — Potential Islamic State threats against Americans in Afghanistan are forcing the U.S. military to develop new ways to get evacuees to the airport in Kabul, a senior U.S. official said Saturday, adding a new complication to the already chaotic efforts to get people out of the country after its swift fall to the Taliban.