Politics

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** FILE ** Migrants ride on top of a northbound train toward the U.S.-Mexico border in Juchitan in southern Mexico on Monday, April 29, 2013. Migrants crossing Mexico to get to the U.S. have increasingly become targets of criminal gangs who kidnap them to obtain ransom money. (AP Photo/Eduardo Verdugo)

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Ambassador Ali Suleiman Aujali's position could be in jeopardy for his ties to Moammar Gadhafi. (associated press)

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Sen. Ron Wyden, Oregon Democrat, noted that helium is "a critical resource for a number of important sectors of the American economy," including semiconductors and fiber optics. (Associated Press)

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Former South Carolina Gov. Mark Sanford speaks with a vendor at the Mount Pleasant Farmers Market in Mount Pleasant, S.C., Tuesday, May 7, 2013. He faces Elizabeth Colbert Busch, the sister of political satirist Stephen Colbert, and Green Party candidate Eugene Platt, in Tuesday's balloting. (AP Photo/Rainier Ehrhardt)

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Washington, D.C. Mayor Vincent Gray, third from right, and Washington, D.C. Metropolitan Police Chief Cathy Lanier, second from right, stand during Blue Mass at St. Patrick Catholic Church, Washington, D.C., Tuesday, May 7, 2013. The Blue Mass is held to pray for those in law enforcement and fire safety, remember those who have fallen, and support those who serve at the beginning of National Police Week. (Andrew Harnik/The Washington Times)

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Washington, D.C. Mayor Vincent Gray, left, and Washington, D.C. Metropolitan Police Chief Cathy Lanier, center, take communion from Cardinal Donald Wuerl, Archbishop of Washington, right, during Blue Mass at St. Patrick Catholic Church, Washington, D.C., Tuesday, May 7, 2013. The Blue Mass is held to pray for those in law enforcement and fire safety, remember those who have fallen, and support those who serve at the beginning of National Police Week. (Andrew Harnik/The Washington Times)

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Washington, D.C. Mayor Vincent Gray, center, and Washington, D.C. Metropolitan Police Chief Cathy Lanier, left, take communion from Cardinal Donald Wuerl, Archbishop of Washington, right, during Blue Mass at St. Patrick Catholic Church, Washington, D.C., Tuesday, May 7, 2013. The Blue Mass is held to pray for those in law enforcement and fire safety, remember those who have fallen, and support those who serve at the beginning of National Police Week. (Andrew Harnik/The Washington Times)

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South Korean President Park Geun-Hye speaks during a news conference with President Obama in the East Room of the White House in Washington on Tuesday, May 7, 2013. (AP Photo/Jacquelyn Martin)

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Gen. Mark A. Welsh III (right), the Air Force chief of staff, and Secretary of the Air Force Michael B. Donley (left) appear before the Senate Armed Services Committee on Capitol Hill in Washington on Tuesday, May 7, 2013. Besides funding for next year's Pentagon budget, the Air Force is dealing with controversy over sexual assaults and how the military justice system handles it. (AP Photo/J. Scott Applewhite)

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** FILE ** The rapper Ja Rule is pictured in a vehicle outside the Martin Luther King Jr. Federal Building and Courthouse in Newark, N.J., after pleading guilty to federal tax evasion charges on March 22, 2011. (AP Photo/Julio Cortez)

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Indonesian U.N peacekeepers patrol the Lebanese side of the Lebanese-Israeli border in the southern village of Kfar Kila, Lebanon, Tuesday May 7, 2013. Four U.N. peacekeepers were seized by armed gunmen on Tuesday while they were patrolling in the demilitarized zone separating Syria from the Israeli-occupied sections of Golan Heights. (Associated Press)