AP Photo/Simon Dawson
London Underground employees observe a minutes silence outside the Russell Square tube station in London, Friday, July 7, 2006. Friday is the first anniversary of the day four suicide bombers attacked London's transit system, killing 52 commuters and themselves by detonating explosive-laden backpacks on three subway trains and a London bus.
AP Photo/Lefteris Pitarakis
A British police officer reads messages placed on flowers in the memory of the July 7, 2005 attacks in central London's Tavistock Square, site of the bombing of the No. 30 bus one year ago, in central London, Friday July 7, 2006.
AP Photo/Lefteris Pitarakis
Londoners react in central London's Tavistock Square, site of the bombing of the No. 30 bus on July 7, 2005, in central London, Friday July 7, 2006.
AP Photo/ Phil Noble
A police officer searches a bag on a platform at Aldgate underground station in east London, Friday, July 7, 2006.
AP Photo/Phil Noble
A police officer watches passengers as they leave a platform at Aldgate underground station in London, Friday, July 7, 2006.
AP Photo/Shaun Curry
Members of the public look at the flowers that have been laid at King's Cross station memorial garden Friday, July 7, 2006, in London, in honor of the commuters who lost their lives during London's terrorist attacks one year ago.
AP Photo/Lefteris Pitarakis
An unidentified relative of a victim of the July 7, 2005 bombing attacks lays flowers in London's Tavistock Square, Friday July 7, 2006. Friday marks the first anniversary of the day four suicide bombers attacked London's transit system, killing 52 commuters and themselves by detonating explosive-laden backpacks on three subway trains and a bus.
AP Photo/Nick Skinner
Susan Harrison, a victim of last year's London Bombing, receives a hug outside Russell Square underground station in London after laying flowers, Friday July 7, 2006. Friday marks the first anniversary of the day four suicide bombers attacked London's transit system, killing 52 commuters and themselves by detonating explosive-laden backpacks on three subway trains and a bus.
AP Photo/Edmond Terakopian
Susanna Pell, who was in the second carriage of the Edgware Road tube train when a terrorist bomb went off, lays flowers at the station Friday, July 7, 2006, in remembrance of those who lost their lives in the bombings on this day last year.
AP Photo/John D McHugh
Police officers patrol the concourse which leads to the Piccadilly Line of the London Underground at King's Cross Station in London, Friday July 7, 2006.
AP Photo/Lefteris Pitarakis
A written message to George Psaradakis, the driver of the number 30 London bus involved in last year's bombing, is seen on his wreath placed in memory of the victims of the bombing attacks in central London's Tavistock Square, Friday July 7, 2006.
AP Photo/Shaun Curry
A woman weeps while being consoled by a Salvation Army officer at King's Cross station memorial garden, in London, Friday, July 7, 2006. Flowers have been laid in honor of the commuters who lost their lives during London's terrorist attacks last year.
AP Photo/Shaun Curry
London Mayor Ken Livingstone, second from the left; Tessa Jowell, third from the left, Secretary of State for Culture; Peter Hendy, left, TFL Commissioner and Tim O'Toole, fourth from the left, London Underground Managing Director, lay flowers in honor of the commuters who lost their lives during London's terrorist attacks at King's Cross memorial garden in London, Friday, July 7, 2006.
AP Photo/Max Nash
Two police officers stand outside the Russell Square underground station in London, Friday, July 7, 2006.
AP Photo/Edmond Terakopian
Family members and friends visit the Peace Garden at Edgware Road tube station, London, to pay their respects to those who lost their lives in the terrorist bombings one year ago, Friday, July 7, 2006.
AP Photo/Sang Tan
A commuter reads the front page of a newspaper, headlining the bombings in London last year, in an underground train in London, Friday, July 7, 2006.
AP Photo/Simon Dawson
A woman reacts as she lays a flower tribute on the first anniversary of the London bombings, in London, Friday, July 7, 2006.
AP Photo/Jane Mingay
Commuters board a London bus, in central London, Friday, July 7, 2006.
AP Photo/Simon Dawson
A Policeman and sniffer dog search outside Russell Square tube station in London, Friday, July 7, 2006.
AP Photo/Jane Mingay
A sign indicating the Edgware Road underground station in central London, Friday, July 7, 2006.