Colorado State Troopers and a Larimer County Sheriff Deputy investigate an accident on Larimer County Road 82, where a car rear-ended a school bus that had stopped to pick up students Friday, April 18, 2014, in Wellington, Colo. A Poudre school official says three children have been injured in the accident involving a school bus and a passenger vehicle north of Fort Collins. (AP Photo/The Coloradoan, V. Richard Haro)