EC03-0225-6 NASA's F-15B research testbed jet from NASA's Dryden Flight Research Center flew in the supersonic shockwave of a Northrop Grumman Corp. modified U.S. Navy F-5E jet in support of the Shaped Sonic Boom Demonstration SSBD project, which is part of the DARPA's Quiet Supersonic Platform QSP program. On Aug. 27, 2003, the F-5 SSBD aircraft demonstrated a method to reduce the intensity of sonic booms. August 25, 2003 NASA Photo / Carla Thomas