An avalanche swept down a climbing route on Mount Everest early Friday, killing at least 12 Nepalese guides and leaving three missing in the deadliest disaster on the world's highest peak. (AP Photo/Gurinder Osan, file)

Discovery network cancels Everest jump

The Discovery Network is canceling a daredevil's planned jump off the summit of Mount Everest following the avalanche that killed at least 1…