Passengers on top of the turret of an MBT

[dunkellic]

the one on the left is the gunner, the one to the right the loader - currently there is no need, and i doubt there ever will be, of a loader - aside from that we have already three seats

edit: yeah, but maybe one day we will find an additional place for the gunner, but just like for the commander it will only be an additional man mounting a gun