Crowds chanted "Justice! Justice!" as people rallied in dozens of U.S. cities, urging authorities to press federal civil rights charges against a former neighborhood watch leader found not guilty in the shooting death of unarmed teen Trayvon Martin. The Rev. Al Sharpton's National Action Network organized the "Justice for Trayvon" rallies and vigils outside federal buildings Saturday in at least 101 cities, including New York, Los Angeles, Atlanta and other locations. One week after a jury found George Zimmerman not guilty in the 2012 shooting death of Martin in a gated central Florida community, people gathered nationwide Saturday to press for federal civil rights charges against Zimmerman. They also called for changes in the nation's self-defense laws. No peace!" some chanted. In Atlanta, speakers noted that the rally there took place in the shadows of federal buildings named for two figures who had vastly differing views on civil rights and racial equality: Richard B. Russell was a Georgia governor and U.S. senator elected in the Jim Crow South; The Rev. Martin Luther King Jr. is the face of African-Americans' civil rights movement. "What's so frightening about a black man in a hood?" said the Rev. Raphael Warnock, who now occupies the pulpit at King's Ebenezer Baptist Church, at the Atlanta rally. Fulton told the crowd she was determined to fight for changes needed to ensure that black youths are no longer viewed with suspicion because of their skin color. Earlier Saturday, at Sharpton's headquarters in Harlem, she implored people to understand that the tragedy involved more than Martin alone. Zimmerman didn't invoke "stand your ground," relying instead on a traditional self-defense argument, but the judge included a provision of the law in the jurors' instructions, allowing them to consider it as a legitimate defense. Neither was race discussed in front of the jury. In Indianapolis, the Rev. Jeffrey Johnson told roughly 200 attendees that Saturday's nationwide rallies were about making life safer for young black men who are still endangered by racial profiling.