In this photo provided by Competitor Group, Harriette Thompson starts the Suja Rock n Roll Marathon in San Diego on Sunday, May 31, 2015. Thompson, of Charlotte, N.C., is a two-time cancer survivor who dealt with the loss of her husband and a staph infection in her legs while training for this years race. If she completes the race she would become, at age 92 years and 65 days, the oldest woman to ever complete a marathon. Her son Brenny Thompson is behind her in the purple shirt. (Paul Nestor/Competitor Group via AP)