Terror training: Schools given lessons in survival

New federal initiative educates public on how to treat gunshots and other injuries

It's become a hallmark of terror attacks and school shootings: the fateful minutes or hours when the wounded are hunkered down, waiting for the violence to play out and for help to arrive.

In Monday's terror attack at Ohio State University, one of the 11 wounded victims hid in a campus building for nearly 90 minutes before police gave the all-clear and she could be treated.