Officials funnel info through Twitter after Amtrak derailment [Updated]

This story was updated on December 20 at 11:00 AM CST.
Amid a disaster, many eyes turn to Twitter.
Thursday was no exception after a tragic train derailment in Washington
state sent officials scrambling to update the public about casualties and
the cause of the deadly crash. On the platform, blood centers solicited
donations, and public figures offered condolences or hawked their political
agendas.
On its inaugural run, an Amtrak train jumped the tracks south of Tacoma,
Wash., killing at least