In the event of a terrorist incident at the atlanta-hartsfield airport, who would be the first to respond?

Atlanta-Hartsfield airport is considered as an international airport that is based in the United States, 7 miles south of the central business district of Atlanta.

In the event of a terrorist incident at the Atlanta-Hartsfield airport, the first to respond would be the Local police and the fire department.
This is to ensure the safety of everyone as well as secure the place and pursue any suspect.

This is what i found on google “the first mobile phone call was made 40 years ago today. on april 3, 1973, motorola employee martin cooper stood in midtown manhattan and placed a call to the headquarters of bell labs in new jersey.” i hope this you for what your looking.