T-minus 10 seconds and counting…Activate main engine hydrogen burn-off system…T-minus six seconds and counting…Ground launch sequencer commands main engine start…T-minus zero seconds…Solid Rocket Boosters ignite…Syncom 3 has lift-off. With those words, the first geostationary satellite launched on August 19, 1964. Syncom 3 was used for communication across the Pacific...