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When the shuttle re-entered the atmosphere, searing hot gases seeped into the wing and incinerated the spacecraft.Discovery and Atlantis will be so-called rescue shuttles for each other should something go wrong. NASA has been readying both shuttles side by side.Readdy admitted he hoped the techniques would be further along, but said that two years ago repairing the shuttle's thermal protection system while in flight was thought impossible.The daylight launch restriction may be lifted if both Discovery and Atlantis go up without any critical debris falling off the external tank during liftoff. NASA has been testing a new radar which it claims day or night has a better eye than optical cameras for debris shedding from the external tank.He's already proved himself to be a modern-day Magellan. In 2002, Fossett became the first solo balloonist to circle the globe nonstop, despite an on-board fire and dangerous winds. Two years later, he and his crew made the fastest circumnavigation on a sailing ship -- 58 days.According to Readdy, engineers at the Kennedy Space Center have been working hard to upgrade the space shuttles, including hardening the vehicle and preparing them for returning to space, "The vehicles look like they are brand new cars," he said.Also, NASA has stated there will be no repair technique for a hole the size of the one that caused Columbia's demise. Instead, the agency has focused on stopping foam from shedding from the external tank so no hole will be created in the first place.NASA has been developing repair techniques for the space shuttle's thermal protection system for the past two years. Not all of the techniques have panned out and the Discovery crew will be testing only three potential fixes for tile instead of the five originally planned. There will be no tests on repair techniques for the reinforced carbon used on the shuttle's wings, where the hole was created in Columbia.Soloing around the globe in a plane is now "the last great aviation record left inside the Earth's atmosphere," Branson said when the mission was announced in 2003.According to Readdy, engineers at the Kennedy Space Center have been working hard to upgrade the space shuttles, including hardening the vehicle and preparing them for returning to space, "The vehicles look like they are brand new cars," he said.

 

 


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