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Photos: Olympic preview capsules for all events
Key dates, venue, big story, who to watch, U.S. prospects and little-known facts for every Olympic sport
-- Compiled by Tribune Olympic Bureau reporters Kevin Baxter, Lisa Dillman, Bill Dwyre, Helene Elliott, Philip Hersh, K.C. Johnson, Diane Pucin, Bill Shaikin, Stacy St. Clair and David Wharton.
July 26, 2012