Northrop Grumman LEMV

The U.S. Army signed the development of an football-sized airship for intelligence, surveillance, and reconnaissance (ISR) with Northrop Grumman and Hybrid Air Vehicles. It will take off like an airplane and once it is airborne it will float with helium. The operational cost is expected to be much lower than the fixed wings UAVs.

More: http://en.wikipedia.org/wiki/Long_Endurance_Multi-intelligence_Vehicle