Barack Obama

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President Obama waves as he boards Air Force One at the Minneapolis St. Paul Airport in St. Paul, Minn., on Aug. 30, 2011, after addressing the American Legion in Minneapolis. (Associated Press)

President Obama listens to an update on the status of Hurricane Irene at Federal Emergency Management Agency (FEMA) headquarters in Washington on Aug. 27, 2011. He is joined by Secretary of Homeland Security Janet Napolitano (left) and FEMA director Craig Fugate (right). (Associated Press)

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President Obama announces his selection of Alan Krueger (left), a labor economist at Princeton University, as chairman of the Council of Economic Advisers on Monday, Aug. 29, 2011, in the Rose Garden of the White House in Washington. (AP Photo/Carolyn Kaster)

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President Obama participates in a news conference about Hurricane Irene at the White House on Aug. 28, 2011. (Associated Press)

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President Obama speaks about Hurricane Irene during a news conference in Chilmark, Mass. on Martha's Vineyard on Aug. 26, 2011. (Associated Press)

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A motorcade with President Obama aboard, seen through the rainy pool van window, moves from Blue Heron Farm in Chilmark on Martha's Vineyard, Mass., on Aug. 25, 2011. (Associated Press)

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ASSOCIATED PRESS Barack Obama shares a "fist bump" with wife Michelle while on the campaign trail in 2008. Fist bump was among more than 100 new terms revealed Thursday for the Merriam-Webster Collegiate Dictionary's newest edition. Other new entries include "tweet," "cougar," and "boomerang child."

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LOOKING AHEAD: President Obama says the U.S. will be "a friend and a partner" to a Gadhafi-free Libya. (Associated Press)

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President Obama speaks about Libya on Monday, Aug. 22, 2011, on Martha's Vineyard in Massachusetts. (Associated Press)

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President Obama waves as he exits Air Force One at the Cape Cod Coast Guard Station in Bourne, Mass., on Thursday, Aug. 18, 2011, on his way to Martha's Vineyard. (AP Photo/Stew Milne)

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President Obama receives a briefing on Aug. 19, 2011, from Homeland Security and Counterterrorism adviser John Brennan in Martha's Vineyard, Mass. (Courtesy of the White House)

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President Obama boards Air Force One at Andrews Air Force Base, Md., on Thursday, Aug. 18, 2011, en route to Martha's Vineyard for a family vacation. (Associated Press)

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President Obama arrives Thursday on Marine One in West Tisbury, Mass., for a 10-day family vacation in Martha's Vineyard, Mass. Before leaving Washington, he signed an executive order freezing Syrian assets and banning U.S. imports of petroleum products that originate in Syria. It also bars Americans from investing in Syria. (Associated Press)

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This is one of 18 online parody postcards from the Republican National Committee to chide President Obama for taking a vacation and his destination choice. More than 30,000 were sent within the first few hours of their availability. (Courtesy Republican National Committee)

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President Obama speaks at a town-hall meeting in Atkinson, Ill., as part of his three-day economic bus tour. "If everybody took an attitude of shared sacrifice, we could solve our deficit and debt problem next week," he tells a hybrid-seed factory audience. (Associated Press)