President Obama meets with Emory University doctors and health care workers during his visit Tuesday to the Centers for Disease Control and Prevention in Atlanta. Mandel Ngan/AFP/Getty Images hide caption

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A health worker speaks with families in a classroom now used as Ebola isolation ward in Monrovia, Liberia. Ebola-stricken West Africa needs more health staff and more medical facilities. John Moore/Getty Images hide caption

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British Prime Minister David Cameron told the House of Commons on Monday that he wants to give police the power to seize the passports of Islamist fighters bound for Iraq and Syria. PA Photos /Landov hide caption

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President Obama speaks during a press conference at the White House on Monday about the situation in Iraq and the ongoing violence in Ferguson, Mo. Win McNamee/Getty Images hide caption

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Immigrants from Honduras and El Salvador who crossed the U.S.-Mexico border illegally are stopped in Granjeno, Texas, on June 25. President Obama asked Congress this week for $3.7 billion to cope with thousands of minors from Central America who are illegally crossing the U.S. border. Eric Gay/AP hide caption

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Detainees sleep in a holding cell at a U.S. Customs and Border Protection processing facility in Brownsville, Texas, on June 18. The White House on Tuesday sought $3.7 billion to deal with the immigration crisis at the border. Eric Gay/AP hide caption

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President Obama ruled out sending ground troops to Iraq, saying any U.S. action must be accompanied by Iraqi political action. Kevin Lamarque/Reuters /Landov hide caption

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President Obama, Jani Bergdahl and Bob Bergdahl speak during a news conference in the Rose Garden of the White House in Washington on May 31 about the release of their son, U.S. Army Sgt. Bowe Bergdahl. Carolyn Kaster/AP hide caption

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In his commencement address to the Military Academy at West Point Wednesday, President Obama condemned isolationism but spent more time outlining the hazards of intervention. Susan Walsh/AP hide caption

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President Obama and Russian President Vladimir Putin meet in Enniskillen, Northern Ireland, on June 17. Obama has strongly condemned Russian intervention in Ukraine but has not yet announced a concrete response. Evan Vucci/AP hide caption

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President Obama meets Friday with immigration activists on the National Mall in Washington. Leslie E. Kossoff/Pool/EPA/Landov hide caption

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Israeli Prime Minister Benjamin Netanyahu attends the weekly Cabinet meeting at his office Sunday in Jerusalem. Netanyahu says world powers gave away too much for too little in the interim deal reached last weekend with Iran over its nuclear program. Getty Images hide caption

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