Terrorism Safety on the London Underground

terrorism in london underground has been major concern because underground s importance makes prime target attacks. many warnings , several attacks, successful, have been made on underground, recent on 21 july 2005, although in case detonators exploded. recent attack causing damage on 7 july 2005, when 3 suicide bombers blew on 3 trains. earliest attack on london underground in 1885, when bomb exploded on metropolitan line train @ euston square station. provisional ira (and predecessors) carried out on ten separate attacks between 1939 , 1993. response growing mumbai-style terrorist attack threats, british transport police has own detachment of armed officers regularly patrol both undergrounds stations , trains.