Activists hold placards during a protest to mark the three-month anniversary of the Deepwater Horizon oil rig explosion before the Capitol Hill in Washington D.C., capital of the United States, July 20, 2010. British Prime Minister David Cameron, on his first official visit to Washington, on Tuesday tried to appease the massive rage at BP company, which was blamed for the responsibility for the Gulf of Mexico oil disaster. (Xinhua/Zhang Jun)

Editor: Lin Zhi