From Yahoo.Com: 

3 ultra-athletes endure sand, heat to run across Sahara Desert

IN THE WESTERN DESERT, Egypt (AP) — Three ultra-endurance athletes have just done something most would consider insane: They ran the equivalent of two marathons a day for 111 days to become the first modern runners to cross the Sahara Desert’s grueling 4,000 miles.

“It will take time to sink in … but this is an absolutely once in a life time thing. They say ignorance is bliss, and now that I know how hard this is, I would never consider crossing the Sahara on foot again,” said American runner Charlie Engle, 44, hours after he and the others completed the run at Egypt’s Red Sea.

(more here)