A Las Vegas police officer pulled off a successful rescue but lost his own life in the process. David Vanbuskirk rode a helicopter to the aid of a hiker stranded on a rock ledge; after he was lowered on a harness, he linked the hiker to rescue gear. But while the hiker was successfully pulled onto the chopper, something—it's not certain what—went wrong with Vanbuskirk's own equipment. He fatally fell into a canyon; other rescuers later retrieved his body.
"This officer dedicated his life to saving people and that act ultimately cost him his own life," says a sheriff. Vanbuskirk, 36, had served with the Las Vegas Metropolitan Police Department for 13 years and was the first to die on duty since 2009, CNN reports. (Read more David Vanbuskirk stories.)