A hospital bed is draped with a flag after a veteran died in the hospice ward at St. Albans VA in Queens, N.Y. Quil Lawrence/NPR hide caption

itoggle caption Quil Lawrence/NPR

Rhett Krawitt, 6, outside his school in Tiburon, Calif. Seven percent of the children in his school are not vaccinated. Courtesy of Carl Krawitt hide caption

itoggle caption Courtesy of Carl Krawitt

Cattle in holding pens at the Simplot feedlot located next to a slaughterhouse in Burbank, Washington on Dec. 26, 2013. Merck & Co Inc is testing lower dosages of its controversial cattle growth drug Zilmax drug in an effort to resume its sales to the $44 billion U.S. beef industry. Ross Courtney/Reuters/Landov hide caption

itoggle caption Ross Courtney/Reuters/Landov

A marijuana bud displayed in Denver. Don't legalize pot, the pediatricians say, but don't lock teenagers up for using it, either. Seth McConnell/The Denver Post/Getty Images hide caption

itoggle caption Seth McConnell/The Denver Post/Getty Images

Guinea's Grand Imam, El Hadj Mamadou Saliou Camara, tells his fellow clerics: "If there is any doubt at all, then no one must touch the body." Kevin Leahy /NPR hide caption

itoggle caption Kevin Leahy /NPR

High school athlete Graham Hill, number 50, suffered a concussion in 2013 while playing football at Trinity Christian Academy in Addison, Texas. Courtesy of Jeffrey McWhorter hide caption

itoggle caption Courtesy of Jeffrey McWhorter

Ultrasound is often used for prenatal screening. It's just one of several prenatal screenings available to pregnant women. iStockphoto hide caption

itoggle caption iStockphoto