UPDATE: 24 hour delay. New event info: On Thursday, June 27, NASA’s newest mission, the Interface Region Imaging Spectrograph or IRIS, will launch from Vandenberg Air Force Base in California. IRIS will take flight using a Pegasus XL rocket, carried aloft by an Orbital Sciences L-1011 aircraft from Vandenberg. This exciting launch will broadcast live at the NASA Ames Visitor Center at NASA’s Ames Research Center.