Attacks on London Transit System: "On 7 July 2005, a series of roughly simultaneous bombings occurred on the London public transport system. Underground trains and buses were the targets of the attacks. At least four explosions have been confirmed by UK authorities.

Sequence of events:

• 8:52 AM GMT Explosion on train leaving Liverpool Station
• 8:56 AM GMT Explosion on train between King's Cross and Russell Square stations
• 9:17 AM GMT Explosion at Edgeware Road Station
• 9:47 AM GMT Explosion on Number 30 Bus at Upper Woburn Square
"

(Via GlobalSecurity.org.)