Haiti's Samyr Laine, 11th in the triple jump at London 2012, is a close personal friend of Facebook founder and chief executive Mark Zuckerberg, having shared a room with him while both students at Harvard University. The American-born Laine, whose parents are Haitian, was the 14th member to join Facebook, the social networking site which now has more than a billion users. "He was always incredibly hard working and serious, both as a student and as an athlete," wrote Zuckerberg on Facebook during London 2012. "He's also just a really nice guy."