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KENNEDY SPACE CENTER, FLA. - Sen. Bob Graham (back), D-Fla., former astronaut and Sen. John H. Glenn (front left), D-Ohio, Sen. John F. Kerry, D-Mass., and Sen. Bill Nelson, D-Fla., don clean room attire during a tour of the Orbiter Processing Facility (OPF). The “bunny suits” are required dress for anyone coming in close proximity to the orbiter Discovery, currently being prepared for flight on the next Space Shuttle mission. The tour of the OPF follows a public meeting Kerry held at the Dr. Kurt H. Debus Conference Facility at the Kennedy Space Center Visitor Complex. He said he chose to speak at KSC because it symbolizes America’s commitment to science, innovation and technology. He and Sen. John Edwards, D-N.C., are on a speaking tour prior to their appearance at the Democratic National Convention in Boston.