America's new Sentry satellite ready for launching at Cape Canaveral, Florida. Adjustments are made on the Atlas carrier and its pay-load the 5000-pound experimental Minus. This missile defense alarm system will circle the earth some 300 miles out. Its heavy weight instrument package waiting to detect the heat trails of missile engines. The launching of the Minus corresponds with the United Nations debate over the U-2 spy plane incident. The Sentry Satellite boasters Ike's "Open Sky Proposal" to these world's tensions. America' new Sentry Satellite sitting on the launching pad. MCUS - Technicians and scientist going over the Sentry to assure that everything is operational when it is launched. MCUS - The 1000-pound experimental Minus. LS - The Sentry Satellite blasting off the launching pad. LS - The Minus blasting off the launching pad. and it is gaining altitude fast.