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seen Aug 29 '12 at 20:41

Aug
29
revised Random walk: police catching the thief
added 21 characters in body; edited title
Aug
29
awarded  Editor
Aug
29
revised Random walk: police catching the thief
deleted 5 characters in body
Aug
29
awarded  Nice Question
Aug
29
awarded  Student
Aug
29
asked Random walk: police catching the thief