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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, launch pad 39A looks much like it did after the liftoff of STS-135, the final space shuttle mission, on July 8, 2011. The mobile launcher platform remains in place next to the fixed service structure and rotating service structure. During the shuttle program, water was stored in the 290-foot-high, 300,000 gallon tank on the right. Water was released just prior to the main engine ignition and flows by gravity to special outlets on the platform to protect the orbiter and its payloads from being damaged by acoustical energy reflec…