We think our feet are always on solid ground, but in Florida it's more like Swiss cheese. Dick speaks to Casey McKinlay, who, along with his diving partner Jarrod Jablonski, pulled off a 21-hour dive through underwater caves that connect sinkholes.
Before Frank McCourt became famous as the author of "Angela's Ashes" and "'Tis," he was for 30 years a high school English teacher in New York. His book about that experience is "Teacher Man." Also in this episode, Meredith Sorenson hikes all 2,168 miles of the Appalachian Trail. Plus, a man named Mervin Jenkins turns his life around.