![]() ![]() The investigation found that cold weather conditions caused an O-ring seal to fail, allowing hot gases from the shuttle solid rocket booster (SRB) to impinge on the external propellant tank and booster strut. The Space Shuttle Challenger was destroyed 73 seconds after lift-off on STS-51-L at an altitude of 15 kilometers (49,000 ft). Vehicle disintegration during launch â Space Shuttle Challenger disaster Near the top of the column on each side is the engraved image of the face of a crew member set into a stylized triangle. ![]() ![]() In a small circular fenced area at the site is a memorial monument in the form of a three-sided metallic column. The Soyuz 11 landing coordinates are 47Â☂1â☢4â³N 70Â☀7â☡7â☾ / 47.35663°N 70.12142Â☎, 90 kilometers (56 mi) southwest of Karazhal, Karagandy, Kazakhstan, and about 550 kilometers (340 mi) northeast of Baikonur, in open flat country far from any populated area. ![]()
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