Russia also reportedly has sold six S-300 air defense systems to Syria under a 2010 contract.
Defense Secretary Donald Rumsfeld ordered air defense systems around Washington armed with anti-aircraft missiles Tuesday.
Now, of course, Patriot missiles are a key component of the U.S. air defense.
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Both snag radio communication, phone calls and emissions from air defense weapons and pinpoint their origins.
In the case of the air, that would mean an air force primarily devoted to air defense.
Defense Secretary Donald Rumsfeld ordered Tuesday the air defense systems deployed around Washington armed with surface-to-air missiles.
Where I am, at the moment, is with the echo battery of the 52nd Air Defense Artillery Brigade.
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That's only one small part of the Air Defense Artillery's planning, which has really been going on for weeks.
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The number of squadrons allocated to air defense were cut by over half.
But since then it has appreciably evolved far beyond its original air defense capabilities to now include a proven anti-missile capability.
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They reported that all sides have switched off their radars and air defense systems in accordance with the Dayton peace agreement.
The latter considerations argue for an aggressive near-term effort to adapt the Navy's AEGIS fleet air defense ships for this purpose.
Defense planners had failed to consider the implications of the proliferation of advanced surface-to-air defense systems and modern (late 20th-century) fighter aircraft.
All of them are contracts for what are solely air defense systems.
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It quoted unnamed Syrian security officials as saying that three sites including military barracks, arms depots and air defense center were targeted by the strike.
This will require immediately expanding the number of Navy ships with the Aegis fleet air defense system that are equipped to intercept ship-launched ballistic missiles.
Raytheon is marketing its Patriot air defense system throughout the region.
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Belarus experts to help build new air defense system in Venezuela.
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Of these, clearly the most cost-effective and -- if properly executed -- nearest-term would be a sea-based program using the Navy's existing Aegis fleet air defense assets.
This will almost certainly involve the use of sea-based assets utilizing the Navy's AEGIS fleet air defense infrastructure -- an option the Russians are determined to foreclose.
The test involved the third straight intercept by a SM 3 missile launched from a cruiser, the U.S.S. Lake Erie, equipped with the Aegis fleet air defense system.
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It can be achieved most rapidly, most efficiently and most affordably from the sea, by adapting the Navy's AEGIS fleet air defense system to shoot down ballistic missiles.
During the same time, Iraq began dispersing aircraft and air defense capabilities in preparation for more aggressive U.S. airstrikes to enforce the "no-fly" zones over northern and southern Iraq.
For the fifth time out of six attempts, Navy ships successfully tracked, intercepted and destroyed a ballistic missile in-fight, using their existing AEGIS fleet air defense systems and a new Standard Missile, dubbed the SM-3.
One result was that Raytheon was able to develop a new version of the Standard Missile used by the Navy for air defense engagements designated the SM-3 that was designed specifically to intercept ballistic targets.
This kind of LEMP weapon could be theoretically deployed as an air defense system to neutralize conventional (IR guided or radar guided) missiles, but could also be used to neutralize UAVs, which are dependent on electronic systems.
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In such a scenario, the United States would have needed to provide not only a significant, possibly the largest fraction of air and naval forces required, but also significant armored formations, air defense units, and even logistical formations.
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There are, moreover, other ways to provide such a defense -- notably, from the sea using modified AEGIS fleet air defense ships -- that could enable a national missile defense to be fielded for a fraction of the cost of the ground-based system.
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Color Red is no substitute for an Iron Dome defense system, but with as little as 15 seconds between an air defense warning and a rocket striking its target, Color Red offers a little bit of extra time for users to find shelter.
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We were told, of course, that the optimal means of meeting Japan's air defense commitments in the 1990's -- namely, an off-the-shelf purchase of F-16's -- had been categorically rejected by the Japanese and that the FS-X deal was the best of the remaining options.
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