In Tucson, 22 former and current soldiers and law enforcement personnel so far have pled guilty to conspiracy charges in an FBI sting posing as cocaine traffickers paid to let loads of the drug get through. According to the Justice Department, while many of those pleading guilty were lured into protecting drug shipments during the sting, at least nine of them had been engaged in real drug trafficking using official uniforms and vehicles to get past Border Patrol checkpoints with more than half a ton of cocaine. Those pleading guilty so far include a former Immigration and Naturalization Service inspector, a former Army sergeant, a former federal prison guard, five current and former members of the Arizona Air National Guard and the state corrections department, and a Nogales, Arizona, police officer, the Justice Department reported May 12, when it announced the pleas of 16 people. Six more have pled guilty since then, with more to come, prosecutors said.