LATEST! Developments in the horrific Boston Marathon terror bombing.
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Boston Globe via Getty

LATEST developments in the horrific Boston Marathon terror bombing.
1. Tragedy by the numbers:
In addition to the three people who perished, 170 others were injured. As of Wednesday, 76 patients remain in Boston area hospitals, with 20 in critical condition (including a 9-year-old girl and 10-year-old boy).
Massachusetts General Hospital chief of trauma surgery Dr. George Velmahos said four patients had to undergo above-the-knee amputations.“It wasn’t a hard decision to make,” Velmahos said. “We just completed the ugly job that the bomb did.”