Bellevue Hospital nurse Belkys Fortune (left) and Teressa Celia, associate director of infection prevention and control, during a demonstration of procedures for possible Ebola patients on Oct. 8. Richard Drew/AP hide caption

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In Mexico City on Wednesday, people march to demand justice for 43 missing students. Mexican authorities ordered the arrest of the mayor of Iguala and his wife in connection with the attack. Yuri Cortez/AFP/Getty Images hide caption

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Secret Service respond on the North Lawn of the White House after a man jumped the White House fence Wednesday night. This latest incident comes about a month after a previous fence-jumper sprinted across the lawn, past armed uniformed agents, and entered the Executive Mansion. Jacquelyn Martin/AP hide caption

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A Canadian soldier who was shot outside the war memorial on Parliament Hill in tended to in Ottawa on Wednesday. Daniel Thibeaut/CBC/Reuters /Landov hide caption

itoggle caption Daniel Thibeaut/CBC/Reuters /Landov

The San Luis Reservoir in central California is the largest "off-channel" reservoir in the U.S. It is currently at less than 30 percent of its normal capacity. Kirk Siegler/NPR hide caption

itoggle caption Kirk Siegler/NPR

A customer sets up her new iPhone 6 at an Apple store in Beijing on Friday. A group says the Chinese government backed an attack against users of Apple's iCloud service, but the government denies the claim. Feng Li/Getty Images hide caption

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Reconstruction of Deinocheirus mirificus. Yuong-Nam Lee/Korea Institute of Geoscience and Mineral Resources hide caption

itoggle caption Yuong-Nam Lee/Korea Institute of Geoscience and Mineral Resources

The homeless and others in need enjoy lunch at the Los Angeles Mission on Nov. 23, 2011, in celebration of Thanksgiving. Legislation to ban organizations from serving food to homeless people in public places has been proposed in Los Angeles. Frederic J. Brown/AFP/Getty Images hide caption

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A passenger wearing a face mask arrives at Los Angeles International Airport Friday. Federal officials now require people traveling from West Africa to enter the U.S. at one of five airports equipped to screen them for signs of Ebola. Mark Ralston /AFP/Getty Images hide caption

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Thai surrogate mother Pattaramon Chanbua with her baby Gammy, who was born with Down Syndrome. An Australian couple who'd arranged for Pattaramon to serve as their surrogate rejected the child. Nicolas Asfouri/AFP/Getty Images hide caption

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Former Blackwater Worldwide guard Nicholas Slatten leaves federal court in Washington in June. Slatten on Wednesday was found guilty of first-degree murder in the deaths of 14 Iraqi civilians in 2007. Cliff Owen/AP hide caption

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Passengers ride a cable car that links downtown La Paz with El Alto, Bolivia, in September. The trip costs about 40 cents and takes 10 minutes — compared with 35 cents and a half-hour by minibus. Juan Karita/AP hide caption

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Researcher Svante Pääbo, was able to extract a complete genome from this ancient human leg bone. Bence Viola/Max Planck Institute for Evolutionary Anthropology hide caption

itoggle caption Bence Viola/Max Planck Institute for Evolutionary Anthropology

Even versions of Zi Xiu Tang Bee Pollen labeled "genuine" and "anti-counterfeit" have been found to contain the drug sibutramine, which was supposed to come off the U.S. market in 2010 for safety reasons. Food and Drug Administration hide caption

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Pro-democracy protesters carrying portraits of Hong Kong Chief Executive Leung Chun-ying march to his residence in Hong Kong on Wednesday. Bobby Yip/Reuters/Landov hide caption

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