X-48 Project Completes Flight Research for Cleaner, Quieter Aircraft

NASA's remotely piloted X-48C hybrid-wing-body subscale aircraft, which demonstrates technology concepts for cleaner and quieter commercial air travel, completed an eight-month flight research campaign on April 9.

via NASA Breaking News

http://www.nasa.gov/home/hqnews/2013/apr/HQ_13-105_X-48C_Final_Flight.html