50 Marathons in 50 Days

Sam Thompson, 25, is running 50 marathons in 50 states in 50 consecutive days. On schedule to finish August 19, Sam says he's doing it to remind the country there is still work to be done on the ravaged Gulf Coast.

"Dean, Dean the PR Machine" Karnazes begins his own 50 in 50 quest in Missouri on September 17 and will finish in New York on November 5. Here's his blog, in which he describes running the Atlanta Marathon with Sam.