I do know that convoy "stuff" is not safe. A guy I work with has a son in the army that's been doing that stuff and he's had waaay too many close calls. One time his convoy was to lead the group, and at the last minute his commander told his convoy to wait and let the other one lead. A few minutes later they hear and see a loud explosion and it was the convoy that went first, which was originally supposed to have been his.