by Stephen Engelberg, ProPublica, Greg Gordon, McClatchy, Jim Gilmore and Mike Wiser, PBS Frontline Oct. 11, 2011, 12:05 a.m.
This story is a joint project with ProPublica, PBS Frontline and McClatchy. The story will air on Frontline on Oct. 11. Check local listings.
WASHINGTON -- Months after the anthrax mailings that terrorized the nation in 2001, and long before he became the prime suspect, Army biologist Bruce Ivins sent his superiors an email offering to help scientists trace the killer.
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