Philippines

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U.S. President Barack Obama, center left, smiles as he walks through the line of a troop upon his arrival Monday, April 28, 2014 at the Ninoy Aquino International Airport in Manila, Philippines. Trade and security are expected to be discussed in Obama's state visit to the Philippines. (AP Photo/Bullit Marquez)

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U.S. President Barack Obama waves to the media upon arrival Monday, April 28, 2014 at the Ninoy Aquino International Airport in Manila, Philippines. Trade and security are expected to be discussed in Obama's state visit to the Philippines. (AP Photo/Bullit Marquez)

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U.S. Ambassador Philip Goldberg gestures as he speaks after signing the Enhanced Defense Cooperation Agreement at Camp Aguinaldo, Philippine military headquarters in suburban Quezon city, north of Manila, Philippines on Monday, April 28, 2014. The U.S. military will have greater access to bases across the Philippines under the new 10-year agreement signed Monday in conjunction with President Barack Obama's visit and seen as an effort by Washington to counter Chinese aggression in the region. (AP Photo/Aaron Favila)

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U.S. President Barack Obama waves as he boards Air Force One at the Royal Malaysian Air Force base in Subang, Malaysia, Moday, April 28, 2014 before heading to to Ninoy Aquino International Airport in Pasay, Philippines. (AP Photo/Lai Seng Sin)

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President Barack Obama waves as he boards Air Force One at the Royal Malaysian Air Force base in Subang, Malaysia, Monday, April 28, 2014, before heading to Ninoy Aquino International Airport in Pasay, Philippines. (AP Photo/Lai Seng Sin)