Submission + - space shuttle
tbonefrog writes: "Has the possibility for preventing another Columbia disaster during certain stages of reentry by utilizing the flight controls to reduce the dive angle, resulting in surviving reentry even if reaching the earth's surface wildly off course. This would have to be planned for in advance and by the use of simulations.
I'm not sure any action would have saved Columbia but if there was an opportunity to save the astronauts, even if the shuttle sank in the ocean, it should be available for future shuttle missions"
