Aug. 12 (UPI) -- Health and Human Services Secretary Robert F. Kennedy Jr. has visited the CDC headquarters in Atlanta where a police officer was killed in a shooting that is believed to have targeted the national public health agency. Kennedy was led by CDC security on a tour of the Roybal Campus on Monday, HHS said in a statement , with HHS Deputy Secretary Jim O'Neill and CDC Director Susan Monarez in attendance. Little information about the tour was made public aside from shattered windows