East Coast of US to have radar detecting blimps in the air

The US does not want another 9/11and, therefore, is beefing up its security measures by sending up radar detecting blimps in the East Coast. These blimps are 80-yard long, radar-fitted surveillance balloons – these will stay afloat at an altitude of up to 10,000 feet and the purpose would be to pinpoint beyond-the-horizon targets like incoming enemy missiles, aircraft or drones.
The first of two of these radar-detecting blimps is expected to rise up over Aberdeen Proving Grounds in Maryland as part of a three-year exercise meant to test the integration of an Army air surveillance system with the North American Aerospace Defense Command.
Subsequently a second balloon is expected to go up by the end of January.
One of the two balloons is installed with VHF radar technology that is capable of scanning up to a distance of about 500-Km – this has been revealed by Raytheon official and director of the Army’s Joint Land Attack Cruise Missile Defense Elevated Netted Sensor System.
The balloons will be filled with helium and air – these are inert gases that do not burn and hence there would be no possibility of them catching fire.
The radar would be scanning 360-degrees and is designed to identify targets or areas of interest for the second aerostat, which uses more precise X-band radar.
NORAD has informed that the data collected during the operational exercise will be used to determine how well JLENS capabilities work with the existing NORAD security architecture because with such information, the senior defense officials can take suitable decisions on whether to transition JLENS capabilities to an enduring mission after the conclusion of its three-year operational exercise.