By: The Associated Press (AP)
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LONDON (AP) — Here are five things to look out for at the London Olympics on Friday:

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1. 4x100 RELAY: The American women look like the team to beat in the final.

2. OSCAR PISTORIUS: South Africa's double-amputee runner finishes his landmark first Olympics in the men's 4x400-meter relay final.

3. BEYOND BOLT: Jamaica's men run in the 4x100 relay heat, but Usain Bolt is unlikely to feature. How much strength in depth do they have?

4. DOPING: Just days before the eight-year deadline expires, the IOC formally stripped American cyclist Tyler Hamilton of his 2004 gold for doping.

5. THEY RULE THE WAVES: Australia bounced back — slightly — from a disappointing Olympics, winning a sailing gold — its third — to become the most successful nation on the ocean at these games.

Athletes

Oscar Pistorius, Usain Bolt