ROUGH CUT - NO REPORTER NARRATION

STORY: President Barack Obama vowed on Tuesday that the Pentagon would spare no effort in investigating a U.S. soldier's deadly shooting rampage in Afghanistan and said he remained committed to "responsibly" winding down the war there.

"We will follow the facts wherever they lead us," Obama said at the White House. "And we will make sure that anybody who was involved is held fully accountable with the full force of law."