An insight into the work of the police officers who tracked down terror suspect Yassin Omar following the attempted bomb attacks that disrupted part of London's transport network on July 21, 2005. Just two weeks after the July 7 bombings, four men wearing rucksacks packed with explosives tried to commit mass murder, but when their devices failed to detonate, officers faced a race to capture them before they could strike again. (thetvdb.com)