I've watched this 3-4 times now and never caught it ! Except for the opening footage when Dad starts rolling away is there a fireman ! Unless I'm mistaking, all the other cab shots with the fighting and such, there is no fireman !! Hmmmmm, I wonder why !! Could it possibly be that if there were a fireman he'd have to be included in the action and robbers would have more to contend with than the producer wished, either to pay for, or to have script deal with another character ? Guess they figured no one would notice..
Are you talking about the old John Wayne movie? It's been a while since I last watched that one. I should pull it out and view it again.