Usain Bolt (JAM) in 9.63s and Olympic record.
Mexico won the Gold Medal for the Men's event
Ranomi Kromowidjojo Netherlands (NED)
Pieter van den Hoogenband of The Netherlands in 48.17
Kosuke Kitajima (Japan) won the gold medal in the men's 100 meter breastroke swimming event in the 2008 Summer Olympics.
what is it