(CNN) — Employees at the top US public health agency, the Centers for Disease Control and Prevention, were winding down their Friday when bullets smashed through their office windows, whizzing just over their cubicle walls.

Across the street from the CDC campus, a gunman — possibly motivated by a hatred of vaccines — had opened fire on the agency’s buildings, bringing panic to the upscale Atlanta neighborhood and the sprawling, open-access campus of Emory University that is adjacent to it.

“Active shooter on Emory Atlanta Campus at Emory Point CVS. RUN, HIDE, FIGHT. Avoid the area. Continue shelter in place. Police on scene,” said a statement from the university.

One first responder, DeKalb County Police Officer David Rose, was killed. A married father of two, with another on the way,

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