21 July 2005 London bombings
On Thursday, 21 July 2005, four attempted bomb attacks by Islamist extremists disrupted part of London's public transport system as a follow up attack from the 7 July 2005 London bombings that occurred two weeks earlier. The explosions occurred around midday at Shepherd's Bush, Warren Street and Oval stations on the London Underground, and on London Buses route 26 in Bethnal Green on Hackney Road. A fifth bomber dumped his device without attempting to set it off.