National

John Limbert stepped down Friday as head of the State Department's Iran desk. In 1979, Limbert was one of 52 Americans taken hostage during the Islamic Revolution. He was held for more than a year. Brad Horn/NPR hide caption

One of the negatives discovered by Rick Norsigian. Courtesy Rick Norsigian hide caption

Pelicans rest on an oil retention boom near Grand Isle, La. Mario Tama/Getty Images hide caption

Ashton Stark stands next to his 1972 Volkswagen Beetle, which he converted into an electric car. Courtesy Noel Stark hide caption

Creek County in Oklahoma is so big, responding to a call can sometimes take a bit of research for Cpl. Allen Harwood. Gail Banzet/NPR hide caption

Staff members at the Army Experience Center in Philadelphia demonstrate the Humvee interactive simulator in 2009. Matt Rourke/AP hide caption

Arizona Gov. Jan Brewer, who appears to have gotten a political boost from her support of the immigration law. Chip Somodevilla/Getty Images hide caption

When you think of Wookiees, you think of Chewy, don't you? Ethan Miller/Getty Images North America hide caption

A drill sergeant passes a row of recruits -- many of them high school juniors and seniors -- headed into their first day of military life at the Army National Guard complex in Marseilles, Ill. Jeff Roberson/AP hide caption