Kentucky Sen. Rand Paul says the U.S. has "gone too far in thinking we can re-create an American democratic paradise in the Middle East." LM Otero/AP hide caption

US soldiers have intervened in during natural disasters such as the 2010 earthquake in Haiti. But a disease outbreak is more complicated. SSgt. Chad Chisholm/U.S. Dept. of Defense hide caption

Many Afghans who have worked as interpreters with the U.S. and other Western governments are trying to get visas to leave. "Mohammad," an interpreter, joined two former British soldiers last year in that country to call on Britain to grant Afghan interpreters asylum. Kirsty Wigglesworth/AP hide caption

Workers at the National Geographic Museum in Washington grind the rough edges off a life-size replica of a spinosaurus skeleton. Mike Hettwer/National Geographic hide caption

A Libyan youth displays his skills in parkour, an extreme sport, during a friendly competition in Tripoli on March 7, 2014. Mahmud Turkia/AFP/Getty Images hide caption

Dr. Lester Minto closes his clinic, Reproductive Services of Harlingen, after 35 years. Lisa Krantz/San Antonio Express-News/Zuma Press hide caption

Republican Gov. Sam Brownback (left) listens while his Democratic challenger Paul Davis answers a question during their first debate at the Kansas State Fair. Charlie Riedel/AP hide caption

Visitors watch an orca performance at SeaWorld in San Diego this year. The company has seen attendance slip in the year since the release of a documentary film critical of the company's captive whale program. Mike Blake/Reuters/Landov hide caption