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

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

This artist's rendering shows Chief Justice John Roberts (center) speaking at the Supreme Court on Thursday. From left are Justices Sonia Sotomayor, Stephen Breyer, Clarence Thomas, Antonin Scalia, Roberts, Anthony Kennedy, Ruth Bader Ginsburg, Samuel Alito and Elena Kagan. The court voted 5-4 to uphold President Obama's health care law. Dana Verkouteren/AP hide caption

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A sign lets voters know they can cast early ballots for the Florida primary election in January at the South Creek Branch Library in Orlando. Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images

James Bendele runs the Falcon Lake Tackle Shop in Zapata, Texas. Bass fishermen flock to the lake, despite the presence of a Mexican drug cartel. Wade Goodwyn hide caption

itoggle caption Wade Goodwyn

Protesters are seen in June 2011 in support of the Tucson Unified School District's Mexican-American studies program. A new state law effectively ended the program saying it was divisive. Ross D. Franklin/AP hide caption

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Former Penn State assistant football coach Jerry Sandusky leaves court in handcuffs Friday after being convicted in his child sex abuse trial at the Centre County Courthouse in Pennsylvania. Mark Wilson/Getty Images hide caption

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Jackson Cahn, who graduated from Whitman College in Walla Walla, Wash., is one of the 3 million young adults the Obama administration says would have risked going without insurance if the health care law hadn't allowed them to stay on their parents' policies. Because of the law, his mother, June Blender, was able to add him to her insurance. Courtesy of June Blender hide caption

itoggle caption Courtesy of June Blender

Construction workers pack up at the end of their workday at the Islamic Center in Murfreesboro, Tenn. Mark Humphrey/AP hide caption

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Tech entrepreneurs gather at the offices of Y Combinator, a company based in Mountain View, Calif., that provides seed money to young startups. Founder Paul Graham predicts half of the startups funded by Y Combinator will ultimately fail. Melissa Block/NPR hide caption

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Research scientist Leila Takayama poses with a PR2 robot at Willow Garage, a robotics company in Menlo Park, Calif., that produces programmable robots. Melissa Block/NPR hide caption

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Sgt. Michael Clark and his fiancee, Kaitlin Forant, hold their son, Michael Clark Jr. It took time for the 18-month-old to recognize his father after Clark's deployment. Tom Dreisbach/NPR hide caption

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Myisha Areloano, Adrian James, Jahel Campos, David Vuenrostro and Antonio Cabrera camp outside President Obama's campaign headquarters in Culver City, Calif., on Friday to protest his immigration policies. Grant Hindsley/AP hide caption

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