Diana Nyad gave a motivational speech this year to the MassMutual Financial Group called This Way to Success.
To listen to her speech, click here, posted by the Premiere Motivational Speakers Bureau.
In the first part of this speech, Diana talks about a Lake Ontario professional marathon swim in 1974 in 48°F water. Later, Diana swam from the north to south in Lake Ontario in 18 hours and 20 minutes, but was removed from the water unconscious after 20 hours and 30 minutes on her way going back on a double-crossing attempt. The details of her solo swim are well-described in her book Other Shores.
Photo of Diana from the American Heart website.