To: i-node who wrote (707168 ) 4/3/2013 3:41:41 PM From: bentway 1 Recommendation Read Replies (1) | Respond to of 1583331 "The research has been productive in that it directly resulted in whatever missile defense we have" Wrong. We have systems that can SOMETIMES down ABM's. They weren't developed from SDI:en.wikipedia.org "IntroductionOn 15 October 1964 the U.S. Secretary of Defense directed that the Army Air Defense System for the 1970s (AADS-70s) program name be changed to Surface-to-Air Missile, Development (SAM-D). [7] In 1975 the SAM-D missile successfully engaged a drone at the White Sands Missile Range. During 1976, it was renamed the PATRIOT Air Defense Missile System . The MIM-104 Patriot would combine several new technologies, including the phased array radar and track-via-missile guidance. Full-scale development of the system began in 1976 and it was deployed in 1984 . Patriot was used initially as an anti-aircraft system, but during 1988 it was upgraded to provide limited capability against tactical ballistic missiles (TBM) as PAC-1 (Patriot Advanced Capability-1). The most recent upgrade, called PAC-3, is a nearly total system redesign, intended from the outset to engage and destroy tactical ballistic missiles." We have some systems supposedly that can handle single ICBM's, that ALSO weren't developed from SDI: " Current counter-ICBM systemsThere are only two systems in the world that can intercept ICBMs. Besides them, many smaller systems exist (tactical ABMs), that generally cannot intercept intercontinental strategic missiles, even if within range—an incoming ICBM simply moves too fast for these systems. The Russian A-35 anti-ballistic missile system for defense of Moscow, whose development started in 1971. Presently active, it is called A-135 and uses Gorgon and Gazelle missiles with nuclear warheads . The U.S. Ground-Based Midcourse Defense (GMD; previously known as National Missile Defense – NMD) system has recently reached initial operational capability. Instead of using an explosive charge, it launches a kinetic projectile . The George W. Bush administration accelerated development and deployment of a system proposed in 1998 by the Clinton administration . The system is a dual purpose test and interception facility in Alaska, and in 2006 was operational with a few interceptor missiles. The Alaska site provides more protection against North Korean missiles or launches from Russia or China, but is likely less effective against missiles launched from the Middle East. President Bush referenced the 9/11 attacks and the proliferation of ballistic missiles as reasons for missile defense. The current GMD system has the more limited goal of shielding against a limited attack by a rogue state ."