MSNBC

According to Reuters, MSNBC web site was offline for two hours Thursday
morning.

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"A spokesman for the site ... confirmed that the site had crashed for
two hours but said the causes were still being investigated."

"The Web news site experienced a "SYN" attack at 7:30
  a.m. ET that caused its content to be
  unavailable to users, according to
  MSNBC.com's technical production staff."