Six months before the space shuttle Challenger exploded over Florida on Jan. 28, 1986, Roger Boisjoly wrote a portentous memo. He warned that if the weather was too cold, seals connecting sections of the shuttle’s huge rocket boosters could fail.
“The result could be a catastrophe of the highest order, loss of human life,” he wrote.




A week after apologizing for signing a controversial document describing homosexuality as "an illness" that can be "healed," Amsterdam's chief rabbi seems to have retracted his apology.





























