In this video image, President Obama speaks to the nation from the Oval Office about the end of the U.S. combat role in Iraq. APTN hide caption

itoggle caption APTN

On April 29, 1975, as Saigon was falling to Communist North Vietnamese forces, a small U.S. Navy destroyer escort ship, the USS Kirk, played a dramatic but almost forgotten role in rescuing up to 30,000 South Vietnamese. Here, a member of the USS Kirk's crew tends to a Vietnamese baby. Hugh Doyle hide caption

itoggle caption Hugh Doyle

Palestinians enjoy the Mediterranean Sea at a Hamas-run beach resort in Gaza City. Ventures such as beach clubs, wedding halls and a shopping center are one way the militant Islamist group is strengthening its rule over the Gaza Strip. Andrea Bruce/VII Network for NPR hide caption

itoggle caption Andrea Bruce/VII Network for NPR

The port city of Mbandaka on the Congo River is a major commercial and transportation hub 500 miles from the capital city of Kinshasa. Shoppers and merchants trade in the city's outdoor markets. Jonathan Blakley/NPR hide caption

itoggle caption Jonathan Blakley/NPR

This image released by the Mexican federal police shows drug kingpin Edgar Valdez Villarreal, aka "the Barbie," a member of one of the country's top drug cartels, during his arrest Monday. HO/AFP/Getty Images/HO/AFP/Getty Images hide caption

itoggle caption HO/AFP/Getty Images/HO/AFP/Getty Images

President Obama greeted Iraq war veterans on Tuesday at Fort Bliss, Tex. Analysts say Obama must figure out how to take credit for drawing down troop levels in Iraq while acknowledging that parts of the mission haven't been accomplished. Tim Sloan/AFP/Getty Images hide caption

itoggle caption Tim Sloan/AFP/Getty Images