Okay on the top of this 747 aft of the cockpit is a bulge. Care to speculate what that structure is? Initially I figured a laser but that makes no practical sense. Radome or of some sort is what I reason to be most propable. A satellite antenaee would not make sense as this seems to be a "line of sight" type sensor? On other notes Rumsfeld has it to be retired from 2009-2012 replaced by a 757 airframe.