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.

On Sunday, CNN reported that the CDC held a video conference with approximately 800 staff members to discuss the traumatic event and allow them to ask questions. Staff said they felt like "sitting ducks" as bullets whizzed just over their cubicle walls and they dove for the floor.