A march in support of Trayvon Martin, a black teenager shot to death in February by a neighborhood watch volunteer in Florida, was organized Wednesday evening in Union Square. People around the world tweeted photos of themselves wearing hoodies -- what Martin was wearing when he was shot -- to show their support.
Trayvon Martin Case Sparks Social Media "March"
Supporters marched Wednesday in Manhattan, but people worldwide are tweeting photos of support.
Trayvon Martin in an undated family photo.