FILE - In this June 28, 2016 file photo, Elizabeth Beisel competes in the women's 200-meter freestyle preliminaries at the U.S. Olympic swimming trials in Omaha, Neb. Beisel competed in three Olympics, but she's never taken on a challenge quite like this. Honoring her late father and raising money for cancer research, she's planning to swim more than 12 miles through cold ocean waters to a popular vacation island off the Rhode Island coast. (AP Photo/Mark J. Terrill, File)

FILE - In this June 27, 2012 file photo, Elizabeth Beisel looks on after swimming in the women's 200-meter individual medley preliminaries at the U.S. Olympic swimming trials in Omaha, Neb. Beisel competed in three Olympics, but she's never taken on a challenge quite like this. Honoring her late father and raising money for cancer research, she's planning to swim more than 12 miles through cold ocean waters to a popular vacation island off the Rhode Island coast. (AP Photo/Mark Humphrey, File)

In this July 2012 photo provided by Joan Beisel, Olympic medalist swimmer Elizabeth Beisel, right, stands for a photo with her father Ted Beisel, left, at the 2012 Olympics, in London. Beisel competed in three Olympics, but she's never taken on a challenge quite like this. She will attempt to become the first woman to swim from the Rhode Island mainland to Block Island. The 10.4-mile swim is to honor her father, who died July 1 after being diagnosed with pancreatic cancer. Beisel has raised more than $121,000 for the fight against cancer and knows that she brought some meaning to her father's life in his final months. (Joan Beisel via AP)