Thousands of New Yorkers took to the streets on Sunday after a Florida jury found George Zimmerman not guilty on all counts in the killing of unarmed 17-year-old Trayvon Martin. The peaceful protest began in Union Square at dusk and proceeded north to Times Square as marchers chanted, "The whole system's guilty."

At left, a mother sheds a tear while holding her son in Union Square. His sign reads, "Justice Was NOT Served." Keep reading for more of the most powerful images from yesterday's rally.