a former 0lympian, who's close to america's athletes this time, told me why some of them are nervous about sharing this moment. i don't think a single athlete is going to speak out at the games — and nor do i think they should. if i were there i would be keeping my mouth shut because the risk is just too great, and this is really a failure of the international olympic committee. it's a failure of leadership that athletes are in this position. china's leaders have promised to deliver an efficient, safe olympic games. but what is always a cold gathering feels much more frosty this time round. this is a games defined by the big fissure on the world stage, with china on one side and the us on the other. and inside the bubble, athletes trying to get on with their sport. robin brant, bbc news, beijing. chris silverwood has stepped down as the head coach of the england men's cricket team. it follows the 4—0 ashes series