The U.S. Defense Department will carry out a test to shoot down an intercontinental ballistic missile for the first time next week, a department official said Friday.The move comes amid concern within the U.S. government that North Korea is accelerating development of its own ICBM that could strike the U.S. mainland.A ground-based interceptor will be launched from Vandenberg Air Force Base in California in Tuesday's test to shoot down a mock-up of an ICBM from Kwajalein Atoll in the Marshall Islands, the official of the Pentagon's Missile Defense Agency said.The GBI system has a spotty trac…READ FULL ARTICLE