Protester Kate Rooth (R) holds a sign as Massey Energy Company CEO Don Blankenship prepares to testify at a Senate hearing on Capitol Hill on May 20, 2010. Led by J. Davitt McAteer, former director of ...
Space shuttle Challenger exploded in a split second two decades ago, but the disaster was years in the making. The primary cause — an O-ring that failed in low temperatures — was only part of the ...
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