
Caeleb Remel Dressel of the United States gets ready before the men's 100m butterfly swimming final at the 17th FINA World Championships held in Budapest, Hungary on July 29, 2017. (Xinhua/Ding Xu)

Caeleb Remel Dressel of the United States gets ready before the men's 100m butterfly swimming final at the 17th FINA World Championships held in Budapest, Hungary on July 29, 2017. (Xinhua/Ding Xu)