On April 29, 1975, as Saigon was falling to Communist North Vietnamese forces, a small U.S. Navy destroyer escort ship, the USS Kirk, played a dramatic but almost forgotten role in rescuing up to 30,000 South Vietnamese. Here, a member of the USS Kirk's crew tends to a Vietnamese baby. Hugh Doyle hide caption

itoggle caption Hugh Doyle

For women who carry certain genes, getting a double mastectomy before anything shows up on a mammogram may reduce breast and ovarian cancer risk. Damian Dovarganes/AP hide caption

itoggle caption Damian Dovarganes/AP

Eggs themselves are remarkably resistant to germs like salmonella. The shell and proteins in the egg white normally do a good job of fending off pathogens. But eggs laid by a bird infected with salmonella will likely be infected, too. Courtesy of John Ingraham hide caption

itoggle caption Courtesy of John Ingraham

Food safety experts traced the salmonella outbreak to Wright County Egg, near Galt, Iowa, which is one of two companies whose eggs are believed to have been contaminated. More than 500 million eggs have been recalled. Nirmalendu Majumdar/AP hide caption

itoggle caption Nirmalendu Majumdar/AP

When The Levees Broke: The rate of suicide in 2008 and 2009 in Orleans Parish was about twice as high as it was the two years before the levees broke.  Above, the 17th Street Canal Levee. Mario Tama/Getty Images hide caption

itoggle caption Mario Tama/Getty Images