Bell Helicopter’s Vice President of Global Military Business Development Keith Flail discusses the development, specs and outlook for the company’s V-247 Vigilant UAV and V-280 Valor tilrotor aircraft with Defense & Aerospace Report Editor Vago Muradian Oct. 3, during an interview at the Association of the United States Army’s annual conference and trade show. The meeting is held Oct. 3-5 at the Walter E. Washington Convention Center in Washington, D.C.