Shifera Tamru (5th in Chicago) and Asefa Mengstu (2:04:06 PB) lead the men's race, while Bere Ayalew (2:22:52) and Abebech Afework (2:23:33) lead the women.
Double medal delight in women s hammer for Team USATF usatf.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from usatf.org Daily Mail and Mail on Sunday newspapers.
At 4:15pm on Sunday, the planets will have aligned in the athletics universe and the stars will be ready to collide in the most spectacular fashion imaginable.