Syria

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This image made from video made available by Syrian TV shows U.N. observer team leader Col. Ahmed Himmiche, left, meeting with the governor of Homs, Syria, Saturday, April 21, 2012. (AP Photo/Syria TV via AP video) TV OUT SYRIA OUT

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In this image made from amateur video released by the Shaam News Network and accessed Wednesday, April 18, 2012, smoke billows following purported shelling in Khaldiyeh district, Homs, Syria. The Associated Press cannot independently verify the content, date, location or authenticity of this material. (AP Photo/Shaam News Network via AP video)

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Defense Secretary Leon Panetta arrives April 19, 2012, on Capitol Hill to testify before the House Armed Services Committee about recent developments with the crisis in Syria. (Associated Press)

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This image made from amateur video released by the Shaam News Network and accessed on Tuesday, April 17, 2012, purports to show smoke rising from buildings in Homs, Syria. (AP Photo/Shaam News Network via AP Video)

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**FILE** Syrian President Bashar Assad and his wife Asma arrive July 13, 2008, for a formal dinner after a Mediterranean Summit meeting at the Petit Palais in Paris. (Associated Press)

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Druze man rides a horse while holding a knife and a photograph of Syrian President Bashar Assad on April 17, 2012, during Syria's Independence Day in the village of Majdal Shams in the Golan Heights, near the border with Syria and Israel. (Associated Press)

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Bahrain Foreign Minister Sheikh Khaled bin Ahmad al-Khalifa (right) speaks April 17, 2012, with Algerian Minister of Foreign Affairs Mourad Medelci during the meeting of the Committee of Ministers of the Arab League to discuss the situation in Syria taking place in Doha. (Associated Press)

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An image from an amateur video released by the Shaam News Network and accessed Tuesday is said to show smoke rising from buildings in Homs, Syria. (Associated Press)

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Anti-regime activists in Syria cover their faces with scarves in the colors of the Syrian revolutionary flag last month as they prepare a protest banner that reads in Arabic, "How would a mother be happy in the Eid (mother's day) while in each home we have a martyr?" With 60 percent of the Arab world's population under 25, protesters say they are working not just for regime change but for the dreams of their generation, on hold for now. (Associated Press)