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Summary:
For some time there has been a growing sense of urgency to develop and deploy effective missile defenses against a range of long and short range ballistic missile threats. Although many might believe this to be relative new to U.S. national security objectives, such interest has been ongoing since the end of World War II. Many current technologies being investigated date their start to the 1980s, and earlier. This effort has been challenging technically1 and politically controversial. Some $110 billion has been spent since the mid-1980s; Congress appropriated $9.3 billion in FY2006. For FY2008 the Administration requested $8.9 billion for the Missile Defense Agency. This report provides a brief overview of U.S. efforts to date. It may be updated periodically.
