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Secretary of Veterans Affairs Eric Shinseki addresses the National Coalition for Homeless Veterans in Washington, D.C., Friday, shortly before he resigned under bipartisan pressure. Win McNamee/Getty Images hide caption

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Kevin Flores, 11, remains under a mosquito net while being treated for dengue fever at La Mascota hospital in Managua, Nicaragua, last fall. Inti Ocon/AFP/Getty Images hide caption

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The World Cup will come to the Arena de Sao Paola, shown here when it was under construction last fall. Brazil is also making a big push to control the local mosquitoes that can spread dengue fever. Friedemann Vogel/Getty Images hide caption

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Measles was brought to Ohio's Amish communities by people returning from mission trips to the Philippines. Chuck Crow/The Plain Dealer/Landov hide caption

itoggle caption Chuck Crow/The Plain Dealer/Landov

The vast majority of young physicians surveyed by Stanford researchers wouldn't want to receive CPR or cardiac life support if they were terminally ill and their heart or breathing stopped. UygarGeographic/iStockphoto hide caption

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Involuntary commitment to a hospital for mental illness can be a lengthy and complex process. A California law makes mandatory outpatient treatment an option. iStockphoto hide caption

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Charlton Memorial Hospital closed in 2013, but it may now be able to offer some ER services thanks to a limited license Georgia is now offering to struggling rural hospitals. Susanna Capelouto hide caption

itoggle caption Susanna Capelouto

Fishermen drag a net in Lake Malawi in 2012. About the size of New Jersey, the lake is home to hundreds of fish species and is considered one of the most biologically diverse lakes in the world. Ding Haitao/Xinhua/Landov hide caption

itoggle caption Ding Haitao/Xinhua/Landov