US President Barack Obama has paid his respects to 18 American soldiers killed in Afghanistan .
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Obama pays respects to American soldiers killed in Afghanistan
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Two US soldiers killed in southern Afghanistan
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Flags flying at half staff Tuesday for soldier killed in Afghanistan
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Obama announces new team for Afghanistan
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Obama to honor fallen police officers
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Funeral held for NYPD officer killed in Afghanistan
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Queen pays tribute to soldiers in Afghanistan
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Two US troops killed by Afghan soldier, civilian
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Seven US troops killed in Afghanistan
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Former US President Bush congratulates Obama
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Obama endorses UN taxes on Americans
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Obama breakfasts with US troops in Afghan capital
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4 us soldiers killed in Afghanistan
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President Obama calls President Zardari to personally express condolences over loss of soldiers -
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President Obama mourns death
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Obama addresses soldiers
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NATO soldier, civilians killed in Afghanistan