Riot police confront protestors near the Bank of England in London, Wednesday, April 1, 2009, as thousands of demonstrators converged on the center of the city to protest against the G20 summit, scheduled to begin April 2.
Police officers on horseback push protesters back in London's financial district, Wednesday, April 1, 2009, ahead of the G20 Summit. World leaders are gathering in London for the Group of 20 Summit amid an unprecedented security operation to protect the meeting from violent protests and terrorists.
British police in riot gear, left, face protesters in central London's City financial district, during clashes, Wednesday, April 1, 2009.
A protester throws an object through the already broken window of a Royal Bank of Scotland branch in London's financial district, Wednesday, April 1, 2009. World leaders are gathering in London for the Group of 20 Summit amid an unprecedented security operation to protect the meeting from violent protests.
Police officers treat a injured protester in London's financial district, Wednesday, April 1, 2009, ahead of the G20 Summit.
A police officer leads a detained protester to a police van in central London's financial district, Wednesday, April 1, 2009, following scuffles ahead of the G20 Summit. World leaders are gathering in London for the Group of 20 Summit amid an unprecedented security operation to protect the meeting from violent protests and terrorists.
A police officer with red liquid on his face and uniform outside the Bank of England faces protesters in central London, Wednesday April 1, 2009. Protesters converged on the Bank of England to demonstrate ahead of the G20 Summit. They were held back by hundreds of British police spearheading a major security operation.
Riot police confront protestors near the Bank of England in London, Wednesday, April 1, 2009, as thousands of demonstrators converged on the center of the city to protest against the G20 Summit.
Riot police confront protestors near the Bank of England in London, Wednesday, April 1, 2009, as thousands of demonstrators converged on the center of the city to protest against the G20 Summit.
Riot police confront protestors near the Bank of England in London, Wednesday, April 1, 2009, as thousands of demonstrators converged on the center of the city to protest against the G20 Summit.
A climate protester places a flag atop a bus stop sign in London's financial district, Wednesday, April 1, 2009, ahead of the G20 summit. World leaders are gathering in London for the Group of 20 Summit amid an unprecedented security operation to protect the meeting from violent protests and terrorists.
A protester waits at Liverpool Street Station in central London's financial district, Wednesday, April 1, 2009, ahead of the G20 Summit.
Protesters march across London Bridge to the Bank of England in London Wednesday, April 1, 2009, in a demonstration against the financial institutions as world leaders from the Group of 20 countries gather for a summit, Thursday, at the ExCel centre.
Protesters gathered outside the Bank of England in London Wednesday, April 1, 2009, in a demonstration against the financial institutions as world leaders from the Group of 20 countries gather for a summit, Thursday, at the ExCel centre.
Protesters in banker and guard costumes march across London Bridge to the Bank of England Wednesday, April 1, 2009, in London in a demonstration against the financial institutions as world leaders from the Group of 20 countries gather for a summit, Thursday, at the ExCel centre.
Hooded protesters gather in central London's financial district, Wednesday, April 1, 2009, ahead of the G20 Summit.
Anti-war demonstrators prepare for a demonstration in front of the statue of former U.S. President Dwight D. Eisenhower outside the U.S. Embassy in London, Wednesday, April 1, 2009, as a demonstration was to take place there later Wednesday. Demonstrators are expected to start the march from the embassy to Trafalgar Square as world leaders gather for the G20 Summit in London to discuss the global financial crisis.
Protesters in masks and suits satirizing bankers gather outside the Bank of England Wednesday, April 1, 2009, in London in a demonstration against the financial institutions as world leaders from the Group of 20 countries gather for a summit which begins Thursday, at the ExCel centre.
Protestors march near London Bridge during protests in London Wednesday, April 1, 2009. World leaders are gathering in London for the Group of 20 Summit amid an unprecedented security operation to protect the meeting from violent protests and terrorists.
A police officer appears bemused by a blue liquid thrown by protesters outside the Bank of England, during protests in the center of London, Wednesday, April 1, 2009.