Technicians at Launch Pad 39A at NASA's Kennedy Space Center in Florida continue repairs to small cracks on the tops of two metal support beams, called stringers, on space shuttle Discovery's external tank, or ET. Teams have built an environmental enclosure in an area around the stringers, which will provide the proper temperature and humidity when foam insulation is reapplied to the tops of the stringers following the repairs. The stringer cracks developed as the ET was being filled for Discovery's launch attempt on Nov. 5 for its STS-133 mission to the International Space Station. Discovery's next launch window extends from Nov. 30 to Dec. 6.
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