31 July 2013
Airships from the Army’s JLENS blimp surveillance program will hover 10,000 feet above Washington, DC within the year, in order to detect incoming missiles. This news comes after six weeks of testing at Aberdeen Proving Ground of the Raytheon Co.'s Joint Land Attack Cruise Missile Defense Elevated Netted Sensor System, or JLENS. The JLENS blimps consist of an integrated surveillance and fire-control radar on two tethered, 74-meter aerostats. They are capable of remaining operational for 30 days and detecting threats up to 340 miles away.
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(Washington Business Journal