British Prime Minister David Cameron speaks with campaigners against female genital mutilation at the Girl Summit in London in July. Oli Scarff/Getty Images hide caption

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Melbourne visitors and residents took to the waters of Australia's St. Kilda Beach in January 2013 to escape a fierce heat wave. Scott Barbour/Getty Images hide caption

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Secret Service Director Julia Pierson testifies before the House Oversight and Government Reform Committee about the White House perimeter breach during a hearing on Tuesday. Pierson stepped down from her position on Wednesday. Chip Somodevilla/Getty Images hide caption

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In New Jersey in March, Dianna Lopez of the Center for Family Services (right) speaks with Betsy Cruz, of Camden, N.J., about health insurance coverage during an Affordable Care Act information session. Lori M. Nichols/South Jersey Times/Landov hide caption

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Mohamed Osman Mohamud, then 19, is shown after his arrest on Nov. 26, 2010, in Portland, Ore. Mohamud was convicted of planning to detonate a bomb during a Christmas tree-lighting ceremony. Getty Images hide caption

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Construction is continuing at the Maryland Proton Treatment Center in downtown Baltimore. It's one of three such centers under development in the Washington, D.C., region. Jenny Gold, KHN hide caption

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San Francisco City Supervisor David Campos (right) walks with drag queen Sister Roma to a news conference on Sept. 17 about a Facebook policy that requires people to use their "real" names on their profiles. The site said Wednesday it will modify how the policy is enforced. Eric Risberg/AP hide caption

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Ello is a new, invitation-only social network that aims to thrive and survive on a business model that does not include selling user data or advertising. Ello.co hide caption

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Tonio Borg of Malta, the European Union's Health Commissioner, is spearheading the EU response to the Ebola outbreak. Gianluigi Guercia/AFP/Getty Images hide caption

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Cuban Premier Fidel Castro addressed the United Nations General Assembly in September 1960 in New York. A new book details secret negotiations between the U.S. and Cuba dating back to President Kennedy's administration. AP hide caption

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Port Louis is the capital of Mauritius, known as the "Switzerland of Africa" because of its wealth and its mountains. The country has banned visitors from Ebola-stricken nations. Paul Russell/Corbis hide caption

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Sen. Elizabeth Warren, of Massachusetts, speaks to a group of supporters at a rally in support of Kentucky Democratic candidate Alison Lundergan Grimes in June. Timothy D. Easley/AP hide caption

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This 2009 photo provided by Jerry Murphy shows Omar Gonzalez, who was married to Murphy's mother, Samantha, until they divorced in 2012. Authorities have identified Gonzalez as the man who got into the White House after scaling a fence on Sept. 19. AP hide caption

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