500 Times Across Knife's Edge
Nelson Daigle has climbed Katahdin 20-30 times every year over the last two decades. That puts him at a total of 462 climbs up Maine's highest peak. Even more impressive, he's accomplished this almost entirely after the age of 50. Daigle is 73 now, and acknowledges that his body may not allow him to climb quite so much in the future. That's why he's made it his goal to reach 500 climbs. Read more at CBS News.