Lighter-than-air vehicles -- aerostats & airships -- perform persistent surveillance for U.S. forces: The Avionics Intelligence Report

Avionics Intelligence Report, 29 April 2011. The U.S. military coninutes to develop airships and tethered aerostats to enable long-term surveillance across the globe. John McHale's video report provides details on how aerostat programs such as the Persistent Threat Detection System aerostat and airship pltaforms such as Northrop Grumman's Long-Endurance Multi-Intelligence Vehicle (LEMV) are giving U.S. forces a persistent surveillance edge .