Changes

== 21 July Failed Bombings ==

== 21 July Failed Bombings ==

<br />Exactly one week later, a second series of four explosions took place on the London Underground and a London bus. The detonators of all four bombs exploded, but none of the main explosive charges detonated, and there were no casualties: the single injury reported at the time was later revealed to be an asthma sufferer. All suspected bombers from this failed attack escaped from the scenes but were later arrested.

<br />Exactly two weeks later, a second series of four explosions took place on the London Underground and a London bus. The detonators of all four bombs exploded, but none of the main explosive charges detonated, and there were no casualties: the single injury reported at the time was later revealed to be an asthma sufferer. All suspected bombers from this failed attack escaped from the scenes but were later arrested.