The Kentucky Derby is one of America's most-watched races in Churchill Downs, in Louisville Ky.
There were 150,000 people in attendance at the Derby this year.
Orb splashed through the slop to win the Kentucky Derby, giving Hall of Fame trainer Shug McGaughey his first victory in the 3-year-old classic.
When the field turned for home on the cool, overcast Saturday afternoon at Churchill Downs, Normandy Invasion grabbed the lead while Orb was gearing up.
But in the deep stretch, Orb prevailed, carrying Joel Rosario to his first Derby win.
Long-shot Golden Soul was second with Revolutionary third. Normandy Invasion faded to fourth.
Orb, the 5-1 favorite, ran the 1¼ miles in 2:02.89