Less than a year ago, a soldier at Fort Hood, Tex., went on a shooting rampage, killing 13 people, and wounding 30 others.
Since that time, military bases across the country have taken part in drills to help them prepare for just such an attack.
The United States Navy requires every naval base in the world to conduct at least four security drills a year. The drills each have different requirements and are all staged and performed with the intense drama the real life scenarios would create.
NAS Meridian conducted its third drill involving a disgruntled firefighter who flew into a rage after losing his job. In the drill, the firefighter retrieved a gun from his car, returned to the station, shot one co-worker and held his former chief hostage.
Lauderdale County Sheriff's Department negotiators were then called to the base.
"Basically we try to diffuse the situation to keep our SWAT team from having to go in," said LCSO investigator Gypsi Ward. "We want a peaceful resolution in getting the bad guy out."
NAS Meridian has a population of about 2,300 people living on base, along with about 1,900 civilians. There are regularly more than 4,000 people on base daily.