Journeys to the mountaintop

"There's no real limit to what anyone can really do, regardless of what you have gone through," says Marine Cpl. Kionte Storey. Cpl. Storey, Cpl. Brad Ivanchan, and SSgt. Mark Zambon all lost their legs while serving in Afghanistan. In these 60 Minutes Overtime extras, the men talk with Lara Logan about loss, recovery, and what it means to climb a mountain.

Marine Cpl. Brad Ivanchan lost both legs while serving in Afghanistan. He says the hardest part of summiting Mt. Aconcagua was battling the elements.

Marine Cpl. Kionte Storey lost a leg while serving in Afghanistan. He tells Lara Logan what he was thinking and feeling when he summited Mt. Vinson.

Marine SSgt. Mark Zambon, who lost both legs while serving in Afghanistan, describes how he honored his fallen comrades when he summited Mt. Kilimanjaro.

Cpl. Kionte Storey and SSgt. Mark Zambon tell Lara Logan about coming to terms with their injuries. "This is something that's present every moment of every day," says Zambon. "You don't do this Monday through Friday, 9 to 5, and take a break on the weekend."