Mitchell spent seven years in the military before leaving to pursue a civilian career.
Fox Theatre, Woodruff Arts Center are proposed as possible sites for the tournament draw, while Mercedes-Benz Stadium could host matches.
News helicopter footage showed dozens of firefighters scouring the debris, with a group appearing to use a saw to cut through the wreckage.
Officials have identified the man who died in a Gwinnett County plane crash on Tuesday.
Gwinnett County holds its annual Veterans Day Ceremony at the Fallen Heroes Memorial on the grounds of the Gwinnett Justice and Administration Center.