FILE - In this Monday, April 20, 2015 file photo, Lelisa Desisa, of Ethiopia, crosses the finish line to win the men's division of the Boston Marathon. On the 63rd anniversary of Roger Bannister breaking the four-minute mile, three elite athletes will attempt to do something arguably more extraordinary, run the first sub-two-hour marathon. Olympic marathon champion Eliud Kipchoge leads the attempt on Saturday, May 6, 2017 at Monza's Formula One racecourse, along with two-time Boston Marathon winner Lelisa Desisa, from Ethiopia, and Eritrean half-marathon world-record holder Zersenay Tadese. (AP Photo/Elise Amendola, File)