Lower-back pain is one of the top three reasons that Americans go to the doctor. But the solution can be a DIY project. iStockphoto hide caption

Jesse Mackey, an NRA member, has taught concealed-carry classes out of his living room in Xenia, Ohio, for a decade. Lewis Wallace/WYSO hide caption

Part of the main street in Hilo, Hawaii, was flattened by a tsunami in April 1946. That big wave was triggered by a quake near the Aleutian Islands, where the edges of two tectonic plates continue to collide. Bettmann/Corbis hide caption

Pag-asa island, part of the disputed Spratly group of islands in the South China Sea, is claimed by both the Philippines and China. It's the only inhabited island in the Spratlys. Rolex Dela Pena/Pool/AP hide caption

Wood specialist Mike Bamforth examines the base of a Bronze Age wooden bucket at the excavation site. Dave Webb/Cambridge Archaeology Unit hide caption

The Supreme Court's ruling casts doubt on the status of the 390 inmates on death row in Florida. Chip Somodevilla/Getty Images hide caption

Kentucky Gov. Matt Bevin is following through on a promise he made to drop the state-run health insurance exchange in favor of the federal HealthCare.gov. Timothy D. Easley/AP hide caption

Dave Manning (left) and three other veterans who are studying to become physician assistants at the University of North Carolina in Chapel Hill. Brian Strickland / News.UNCHealthcare.org hide caption

Mohammed al-Nimr is the son Shiite Sheikh Nimr al-Nimr, who was executed by Saudi Arabia. Courtesy of Mohammed al-Nimr hide caption