Tragic Death of Trayvon Martin - Was it the result of racial injustice?

Over the course of the last week, I've been learning more about this case from Florida, and it is full of disturbing details.  Some of those involve race, as the shooting victim was an unarmed black teenager, shot and killed by an armed white man serving as a community watch volunteer.  The shooter claimed that he feared for his life, and the shooting was in self-defense.  But there are a lot about this case that call this version of of what happened into question.

Outrage is building and today, there were protests in Florida and almost half a million people have signed an online petition calling for an arrest of the shooter, George Zimmerman.

An ABC News report on the release of the 911 tapes of the incident: