Hypersonics expert and former chief scientist of the U.S. Air Force Dr. Mark Lewis joins Aviation Week's Christine Boynton, Guy Norris and Graham Warwick to examine the X-30 NASP program, and how—decades later—its legacy still lives on. Check 6 Revisits delves into Aviation Week's more than 100-year archive. Subscribers can explore our archive here and read key Aviation Week articles on NASP here:  Reagan Endorses Station, Advanced Transport (Feb. 10, 1986) X-30 Technology Advancing Despite Management Rift (March 7, 1988) The X-30: Leading The Way Into The Hypersonic Era (Nov.13, 1989) Senate Balks At Raising X-30 Funds, Placing NASP’s Future In Doubt (June 29, 1992) Editorial: Recommit To Hypersonics (Nov. 30, 2009) Audio Clip Feb. 4, 1986: President Reagan's State of the Union Address (C-SPAN)