Rasco, an explosives detection police dog, and officer Paul Stanton, above and right, search a parking garage at the University Hospital in Salt Lake City Wednesday after a bomb threat. The threat was phoned in earlier that morning, prompting law enforcement to conduct a sweep of the area. No patients were evacuated, but numerous fire crews were called up to the hospital to stand by just in case, said Salt Lake fire spokesman Scott Freitag. Access to the hospital was temporarily restricted.