War_Conflict

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Middle school students in Hacienda Heights, Calif., learn Chinese language and culture as part of the Confucius Classroom grant program. The middle-class town, about 16 miles east of downtown Los Angeles, has a history of racial tensions between longtime residents and relatively recent Chinese newcomers. (Associated Press)

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** FILE ** Sens. John McCain and Jon Kyl, Arizona Republicans, listen on April 19 as Pinal County, Ariz., Sheriff Paul R. Babeu (left) calls for more National Guard troops for border security. Cochise County, Ariz., Sheriff Larry A. Dever (right) concurred. (AP Photo)

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A Chinese People's Liberation Army Airforce's "Bayi Aerobatic Unit" J-10 fighter jet taxis back upon landing as an air force personnel stands guard at a base of the PLA Airforce's 24th Division in Yangcun, Tianjin, China, Tuesday, April 13, 2010. The media, along with about 51 military attaches from embassies in Beijing, including the United States, Britain and Israel, witnessed a 15-minute demonstration by four pilots from the 24th Air Division in China's domestically developed J-10 fighters. (AP Photo/Alexander F. Yuan)

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** FILE ** A Sudanese street vender waves Sudanese flags at a traffic line in Khartoum, Sudan, Thursday, April 8, 2010. (AP Photo/Amr Nabil)

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Supporters of anti-U.S. Shiite cleric Muqtada al-Sadr wave Iraqi flags as they destroy a symbolic model of a U.S. Army tank during a rally marking the seventh anniversary of the fall of the Iraqi capital to American troops in the holy Shiite city of Najaf, Iraq, Friday, April 9, 2010.(AP Photo/Karim Kadim)

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** FILE ** Abu Obeida, center, spokesman for the Qassam Brigades, the Hamas' military wing, holds a press conference in Gaza City, Friday, March 26, 2010. (AP Photo/Hatem Moussa)

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Abu Obeida, center, spokesman for the Qassam Brigades, the Hamas' military wing, holds a press conference in Gaza City, Friday, March 26, 2010. (AP Photo/Hatem Moussa)

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A Palestinian demonstrator uses a slingshot to hurl stones at Israeli soldiers, not seen, during clashes in the West Bank village of Iraq Burin, near Nablus, Saturday, March 20, 2010. A Palestinian teenager was killed during clashes with Israeli troops in Iraq Burin, medical officials said. (AP Photo/Nasser Ishtayeh)

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Palestinians hold up a banner with a swastika during clashes with Israeli soldiers, not pictured, near the Kalandia checkpoint between the West Bank city of Ramallah and Jerusalem, Friday, March 19, 2010. (AP Photo/Tara Todras-Whitehill) ** FILE **

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This photo, also from the Imperial War Museum in London, shows a "defiant garden" that was planted in a crater in front of Westminster Cathedral in London during World War II. (Associated Press)

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**FILE** Colombian army soldiers unload supplies from a helicopter during a February operation to relieve troops in Alto Guaduas, Caqueta state, in southern Colombia, a region with a strong presence of the Revolutionary Armed Forces of Colombia. (Associated Press)

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**FILE** Grenades allegedly belonging to soldiers who were killed by rebels sit on the ground in Corinto in southern Colombia in November. (Associated Press)

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** FILE ** Al Qaeda makes its presence known in a Muslim area of Kano, Nigeria. The increasingly active and growing Islamic Maghreb is threatening to further destabilize fragile governments in heavily Islamic North Africa. (Associated Press)

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Marines carry a wounded comrade to a waiting helicopter after an improvised explosive device detonated near their armored vehicle in the Taliban stronghold of Marjah in Afghanistan's Helmand province on Tuesday. (Associated Press)

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**FILE** A Somali Islamist militant patrols the streets of Mogadishu. Al-Shabab Islamic insurgents, with links to al Qaeda, last year looted two United Nations compounds in southern Somalia. The Somali capital sees almost daily attacks aimed at disrupting the weak government. (Associated Press)