7 July 2005 London bombings
Mohammed Rehman and Sana Ahmed Khan were sent to life in prison on 29 December 2015 for preparing an act of terrorism. The plan was for it to be on the tenth anniversary of the 7 July 2005 London attacks. They had 10kg of urea nitrate to make bombs. Rehman called himself the 'silent bomber' and asked his Twitter followers to choose between the Westfield shopping centre or the London Underground as the place where the planned suicide bombing would take place. He was found by the police because of his posts on Twitter. Rehman was found and arrested a few days before the planned attacks.