I've collected a decent library of P-61 books and have been looking for some answered with respect to the top turret which gave Northrop a lot of trouble (buffeting), not to mention availability to the same turrets being prioritized for the B-29. One problem is that three of the books I have...
So let's see if this is the new punching bag for the press! I worked on the B-2 AV3 - 7 and wish Northop and its employees all the best. I always felt Northrop got screwed over by the premature B-2 cancellation.
Air Force picks Northrop Grumman to build next big bomber - Yahoo News
The Northrop YA-9 was a prototype attack aircraft developed for the United States Air Force A-X program. The YA-9 was passed over in preference for the Fairchild Republic YA-10 that entered production as the A-10 Thunderbolt II. First flight 1972