(CBS News) Paul de Gelder has turned tragedy into triumph.
In February 2009, de Gelder was with the Australian Navy, part of an elite dive team.
While on a dive to test new counterterrorism hardware in Sydney Harbor, he was suddenly attacked by a bull shark - an attack caught on video.
Though his team was in a boat and rescued him within minutes, de Gelder barely survived. He lost a forearm in the attack and, days afterwards, his right leg was amputated.
But de Gelder's recovery was remarkable. He was back in the water just three months later.
He's even gone skydiving.
He tells his story in a book, "No Time for Fear," and he did the same for "CBS This Morning: Saturday" co-hosts Jeff Glor and Rebecca Jarvis.