We're back at here early at the Bird's nest after 5 hours sleep.
The one preview we haven't done is the women's 5k so here goes.
1) Genzebe Dibaba is going to win gold.
2) If you haven't broken 14:40 this year, you aren't medalling. Here are your potential medallists:
1 14:14.32 Almaz Ayana ETH Diamond Shanghai
2 14:15.41 Genzebe Dibaba ETH Areva Saint-Deni
3 14:34.10 Mercy Cherono KEN 7 May 91 Paris
4 14:34.22 Viola Kibiwot KEN
5 14:36.44 Senbera Teferi ETH
3) The US has ZERO medal hopefuls but a number of peopel who could make the final.
And the race has just started.