Adrian Hill, director of the Jenner Institute and chief investigator of the trials with an Ebola vaccine his organization developed, holds a vial of the vaccine. Steve Parsons/WPA Pool/Getty Images 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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New York City Mayor Bill de Blasio signs an executive order raising the city's living wage law Tuesday. The move will require some employers to pay their employees between $11.50 and $13.13 an hour, depending on whether the employee receives benefits. Andrew Burton/Getty Images hide caption

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Secret Service director Julia Pierson enters a hearing room in April to answer questions before a closed meeting of the Senate homeland security committee in Washington. Today, Pierson will appear before a House committee to respond to questions about White House security breaches. Cliff Owen/AP hide caption

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EBay announced it will split from the payments service PayPal, forming two independently traded companies beginning in 2015. Joe Raedle/Getty Images hide caption

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California Gov. Jerry Brown has signed the nation's first statewide ban on single-use plastic bags. Here, mixed plastic items are seen at a recycling plant in Vernon, Calif., earlier this year. Reed Saxon/AP hide caption

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A poultry processing plant in France. Europe banned treating chicken carcasses with chlorine in the 1990s out of fear that it could cause cancer. Christophe Di Pascale/Corbis hide caption

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Pro-democracy activists sleep, rest and walk on a street near the government headquarters Tuesday in Hong Kong. Students and activists, many of whom have been camped out since late Friday, spent a peaceful night singing as they blocked streets in Hong Kong in an unprecedented show of civil disobedience to push demands for genuine democratic reforms. Wong Maye-E/AP hide caption

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Boys show off their four-legged friends at a rabies vaccination drive set up by the Serengeti Health Initiative in the Bariadi District of Tanzania. Anna Czupryna/Courtesy of Serengeti Health Initiative hide caption

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Daniela Chavarriaga holds her daughter Emma as Dr. Jose Rosa-Olivares administers a measles vaccination at Miami Children's Hospital. Joe Raedle/Getty Images hide caption

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Some potential new Ebola drugs will be tested at treatment centers like this one run by Doctors Without Borders near Monrovia. John Moore/Getty Images hide caption

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Husain Abdullah of the Kansas City Chiefs scores a touchdown after an interception against the New England Patriots Monday. He was then penalized for praying on his knees — something the NFL now says shouldn't have been punished. Dilip Vishwanat/Getty Images hide caption

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Liberian physician Martha Zarway continues work in a temporary clinic while her original facility is disinfected. Tommy Trenchard for NPR hide caption

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Security personnel guard the entrance of a road leading to a trail on Mount Ontake in Nagano prefecture Tuesday, three days after the volcano erupted in central Japan. Jiji Press/AFP/Getty Images hide caption

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University of Illinois student Stanley Dayan (from left) and Chabad Jewish Center employees Mordy Kurtz and Yosef Peysin work at the center's kosher food stand in 2013 at the university's State Farm Center basketball arena in Champaign, Ill. David Mercer/AP hide caption

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Afghan National Security Adviser Mohammad Hanif Atmar (right) and U.S. Ambassador to Afghanistan James Cunningham exchange documents after signing the Bilateral Security Agreement, with Afghan President Ashraf Ghani (rear, left) and Chief Executive Abdullah Abdullah in the background. Jawad Jalali/EPA/Landov hide caption

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