LONDON (Reuters) - Volunteers working at the London Olympics have been warned not to give away breaking news about athletes or disclose the location of politicians and celebrities through online comments or pictures posted on social media sites. Organisers are in the process of recruiting 70,000 unpaid volunteers to help run the Games from July 27-August 12. Britain said last month that it would provide up to 13,500 troops to protect the Games after organisers said security needed to be doubled. As well as the athletes, many world leaders traditionally visit the Games at some point. ... read more..