Armstrong stepping down as Livestrong chairman

Wednesday, October 17, 2012 | 8:09 a.m. CDT; updated 1:42 p.m. CDT, Wednesday, October 17, 2012

AUSTIN, Texas — Lance Armstrong stepped down as chairman of his Livestrong cancer-fighting charity, and Nike severed ties with him as fallout from the doping scandal swirling around the famed cyclist escalated Wednesday.

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