US Government Invests $1.2B in LTA The product of multiple taxpayer funded programs costing more than $100 million each and a combined thirty years of development, where are they today and why? Dragon Dream Aeroscraft’s Dragon Dream is a fully-rigid, hybrid airship design. Airlander 10 HAV’s Airlander 10 is a simi-rigid, hybrid airship design. P-791 Lockheed Martin’s P-791 is a semi-rigid, hybrid airship design. GAO Official Report Click here to see the full report.