In early 2006, a fire ripped through an Akron Ohio airdock operated by Lockheed Martin, as reported by WKYC. The building that formerly housed the Goodyear blimp fleet was being renovated at the time of the blaze.  The airdock was being retrofitted to house and build the next generation in unmanned surveillance blimps.

Part of DARPA's ISIS program, "High Altitude Airships" or HAAs, are unmanned solar powered airships that can remain in geostationary orbit at approximately 65,000 feet above the earth.  Armed with radar and other surveillance systems, a dozen of the blimps working in unison could monitor the entire US coastline and act as an early warning system for detection of incomming enemy missiles.  

 "The possibilities are endless for homeland security," says Kate
Dunlap, a Lockheed Martin spokesperson. "It could house cameras, and
other surveillance equipment. It would be an eye in the sky."

 The HAAs design will make it invisible to those on the ground and airplanes flying nearby.  Recent tests by China, employing their anti-satellite rocket, have made redundancy in America's surveillance arsenal a priority.  Of course, there are also fears that the Airships would be used in the ever widening domestic spying program against the citizens of the United States. 

An advertisement outside a London Metro station puts this story into perspective.

-tdm