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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Currently, half of all products served in the school lunch program must be "whole-grain rich," which USDA defines as products made of at least 50 percent whole grain. According to the new standards, by the start of the next school year, schools must use only products that are whole-grain rich. Rogelio V. Solis/AP 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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