Swimmer Michael Phelps smashed the world record for the 200-meter butterfly swim at just 15 years old.
He swam an impressive 1:54.58 and held the record for 18 years.
Swimmer Michael Phelps smashed the world record for the 200-meter butterfly swim at just 15 years old.
He swam an impressive 1:54.58 and held the record for 18 years.