(05/18/1999) -- As the STS-93 stack of solid rocket boosters and external tank moves toward the Vehicle Assembly Building (VAB), it passes underneath one of the lightning shield wires strung from the roof of the VAB for protection. The stack is temporarily being stored outside while repair work is being done inside on the hail-damaged external tank of Space Shuttle Discovery. Discovery was rolled back from Pad 39B to the VAB for repairs because access to all of the damaged areas was not possible at the pad. The STS-93 stack is expected to be moved back into the VAB after Discovery returns to the pad. The scheduled date for launch of mission STS-96 is no earlier than May 27. STS-93 is targeted for launch on July 22, carrying the Chandra X-ray Observatory