More than 500 athletes from 43 states took part in the meet.
The athletes take part in 25 events over the year.
It is thought that around 4,000 athletes took part in these games.
More than 1,000 athletes are taking part in the games, which run through Sunday.
The athletes could only take part in the game as individuals.
Not a moment too soon, the athletes will take their marks.
I don't understand why some athletes take so long to recover.
But few athletes would have taken the chance in circumstances such as this.
In the 1988 games, more than 600 athletes representing 22 countries took part.
Just proves an athlete can take 17 days and look beyond themselves.