by Duncan Larkin
Tens of thousands will be running for something in March.
by Duncan Larkin, Published Apr. 26, 2011
Participants can pledge to do a 4-mile run or walk between May 1 and May 22, wherever they are.
by Duncan Larkin, Published Mar. 11, 2011, Updated Mar. 14, 2011 at 2:26 PM UTC
There's $400,000 to go with only nine days left.
by Duncan Larkin, Published Jan. 7, 2011
Actor Edward Norton is spearheading the new, aggressive challenge.
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