Use of synthetic "bath salts," compounds sold legally but used as a controlled substance, has been on the rise since 2010. Brian Peterson /Minneapolis Star Tribune hide caption

itoggle caption Brian Peterson /Minneapolis Star Tribune

Doug Jones, owner of Piedmont Biofarm in Pittsboro, N.C., waters vegetables as temperatures in the South soar, Friday, June 29. Triple-digit temperatures are expected for several days in North Carolina. Gerry Broome/AP hide caption

itoggle caption Gerry Broome/AP

College students surrounded President Obama earlier this month when he called on Congress to stop student loan interest rates from doubling. Congress agreed on a deal to prevent the hike on Friday. Jewel Samad/AFP/Getty Images hide caption

itoggle caption Jewel Samad/AFP/Getty Images

Branches and power lines littered the nation's capital after bruising storms swept through the Mid-Atlantic region on Friday night. Win McNamee/Getty Images hide caption

itoggle caption Win McNamee/Getty Images

The U.S. Border Patrol uses wild mustangs rounded up from the Rockies as it takes its hunt for smugglers into the most rugged terrain on the Arizona-Mexico border. Joshua Lott/Reuters/Landov hide caption

itoggle caption Joshua Lott/Reuters/Landov

A headline in The Record newspaper in Stockton, Cailf., tells the story of the city's plan for operating under Chapter 9 bankruptcy protection following failed talks with bondholders and labor unions. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images