Hello to our viewers worldwide.I'm Carl Azuz in Atlanta, Georgia.Our first story takes us to Columbia, Missouri.The president of the University of Missouri System, which includes the Columbia campus plus others, quit his job yesterday.Tim Wolfe said he took full responsibility for inaction over recent racial struggles at the school.The undergraduate population at Missouri's Columbia campus is about 79 percent and 8 percent black.African-American students and student leaders say the administration did not effectively deal with racial slurs and offensive behavior on campus.Officials had ordered sensitive training for students and faculty, but black students said that wasn't enough.One graduate student went on a hunger strike, demanding President Wolfe's removal over the issue.And many of Mizzou's football players with their coach's support threaten not to play again until the hunger strike was ended.President Wolfe announced that this is not the way change should come about, but from listening, learning, caring and conversation.Please, please use this resignation to heal, not to hate.There's a possibility that Russian track and field athletes could be banned from the 2016 Olympics in Brazil.Why? An independent report that accuses Russian competitors and officials of cheating.How? Through the use of banned performance enhancing drugs.The report from the World Anti-Doping Agency says it found a culture of cheating at all levels in Russian athletics.