Bob Butler (left) and Bob Gordon work on a memorial Thursday at Central Christian Church in Killeen, Texas, for the victims of the Fort Hood shooting. Eric Gay/AP hide caption

President Obama stands on stage with Vice President Biden and their families after accepting the party nomination during the final day of the 2012 Democratic National Convention in Charlotte, N.C. Alex Wong/Getty Images hide caption

Sheldon Adelson listens as New Jersey Gov. Chris Christie speaks during the Republican Jewish Coalition meeting on March 29 in Las Vegas. Several possible GOP presidential candidates gathered in Las Vegas as Adelson, a billionaire casino magnate, looks for a new favorite to help on the 2016 race for the White House. Julie Jacobson/AP hide caption

Where's the moon rock? Curators say national treasures are often overlooked in the museum's current display, which hasn't changed much since 1976. National Air and Space Museum, Smithsonian Institution hide caption

We hate losing twice as much as we love winning, behavioral researchers say. And that gets us into trouble with financial decisions. iStockphoto hide caption

Arc Iris is the self-titled solo debut of Jocie Adams, a former member of The Low Anthem. Shervin Lainez/Courtesy of the artist hide caption

University of Miami President Donna Shalala cuts down the net after a basketball game against Clemson last year. J Pat Carter/AP hide caption

An Afghan woman listens to presidential candidate Ashraf Ghani during a campaign rally in Kabul on March 9, International Women's Day. Women will play a greater role in choosing Afghanistan's next president than ever before. David Gilkey/NPR hide caption