Space: NASA Mission to Probe Sun's Mysteries

NASA, the U.S. space agency, is preparing to launch a mission to study the sun, specifically its mysterious interface region, the area between the sun's surface and its corona or upper atmosphere. VOA's Suzanne Presto in Washington has more about the Interface Region Imaging Spectrograph, or IRIS, which is set to launch from Vandenberg Air Force Base in California on June 27.