Making weight key to Olympic dreams

In this June 25, 2011, file photo, Tyrieshia Douglas (left) of Baltimore and Marlen Esparza of Houston exchange punches in a women's 112-pound title fight at the the US Boxing National Championships in Colorado Springs, Colorado. Esparza nearly exploded with joy when she first learned her sport had been admitted to the London Olympics. The six-time national champion's excitement cooled a bit when she learned the Olympic invitation came with a catch. Ed Andrieski / Associated Press, File