Dear USAF... Um... Hello, 777 much?
From prior studies of four engine systems, the wing structural modifications paled in comparison to the aerodynamic issues introduced; as was discussed in the article.
So 8 engines it is....
Please... take your hyperbole elsewhere.
Yes. Boeing has the line. They build components quite often for spares and the last upgrade put new wings on the fleet.
Engines are not a problem since they are a militarised version of an...
Actually, yes, they can and that IS a valid reason.