Thousands attend 'Justice for Thug Trayvon' rally in Chicago's Loop - Trayvon Martin is the thug the jury found attacked George Zimmerman before Zimmerman was JUSTIFIED in FATALLY SHOOTING HIM

Protesters hold signs during the "Justice for Trayvon" vigil organized at the Dirksen Federal Building in Chicago. (Anthony Souffle/Tribune photo)

Thousands filled Federal Plaza in the Loop for a rally today protesting a jury's acquittal of George Zimmerman.

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