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Now on the NASA Space Shuttle Status Report: It Takes Two. An important, second test on Space Shuttle Discovery's External Tank. Then, ET-121 attaches to its Solid Rocket Boosters and prepares to fly with Discovery. Plus, a date for Discovery to roll back and Atlantis processing picks up the pace. The NASA Space Shuttle Status Report starts right now_ I’m Ted Mosteller, NASA test director at Kennedy Space Center in Florida, and this is the NASA Space Shuttle Status Report. Space Shuttle Discovery and orbiter Atlantis are making Return to Flight progress. On May 20th at the Kennedy Space Center, a second test was successfully completed on Space Shuttle Discovery's External Tank. Engineers and technicians added instrumentation to the tank to troubleshoot two issues that came up during the April 14 tanking test. The instrumentation will provide data to analyze the liquid hydrogen sensors that gave intermittent readings and the liquid hydrogen pressurization relief valve that cycled more times than is standard during the last test. Propellants were loaded into the tank, then an ice and debris team checked the tank's thermal protective coating for frost and ice build up. The propellants