23 January 2014
Two blimp-like surveillance craft will be deployed near Maryland’s Aberdeen Proving Ground later this year for a three-year test. From 10,000 feet, they will cast a vast radar net from Raleigh, N.C. to Boston and out to Lake Erie, with the goal of detecting cruise missiles or enemy aircraft for interception before they can reach Washington, DC. (Image Credit: Wikipedia/U.S. Air Force)
More Info > (The Washington Post)