This gallery of faces and voices from the Million Hoodie March for Trayvon Martin, held Wednesday evening in New York City, illustrates the diverse group of people and opinions that were represented at the Union Square rally.

Flip through the photos in this slideshow to see great exclusive pictures of the men, women and children who turned out to protest the handling of the investigation into 17-year-old Martin's death at the hands of 28-year-old George Zimmerman in their Florida neighborhood on Feb. 26.

Zimmerman admits he shot the teen, but he hasn't been arrested because Florida gun laws are especially lax. The failure to prosecute him so far (though the U.S. Justice Department has announced a federal inquiry into the case), combined with the fact that he killed Martin despite the youth was carrying no weapons and appeared to have been minding his own business before he was approached by Zimmeran on a street near his father's home, have angered many people.

And that anger was turned into nonviolent protest, when thousands of people descended upon Union Square to show support for Martin's family and others who want to see justice better served in the case.

After listening to speeches by Martin's mother and attorney, several polticicans and other leading figures, many attendees of the protest marched to Times Square, where the protest continued.

From Martin's parents, to a 19-year-old white girl from Manhattan, and from a a 17-year-old black kid in a hoodie to an underground revolutionary rapper, this gallery shows the gamut of opinions and faces, which reveals the differences between all of us, but illuminates the similarities.

Supporters who aren't in New York City can get involved by uploading a picture of themselves wearing a hoodie, accompanied by the hashtag #millionhoodies, to Twitter, Facebook, or Instagram.

They can also sign the change.org petition created by Martin's parents to implore prosecutors to bring a case against Zimmerman. The petition has more than a million signatures.

Concern is rising throughout the nation about the Martin case, which many Americans see as indicative of larger issues of injustice in the country.