| http://www.w3.org/ns/prov#value | - The worst accident in NASA history, the Challenger explosion claimed the lives of all 7 astronauts, among them Christa McAuliffe, 37, a high-school social studies teacher from New Hampshire, who would won a nationwide competition to be the first private citizen to fly aboard a space shuttle. (credit for photo of McAuliffe, standing 2d from left, along with fellow astronauts: left to right in front
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