Originally Posted by
tdracer
No...
Interesting that the linked article notes Orbital ATK as a major subcontractor. Their primary product is solid propellant rocket motors (they did the solid boosters for the Space Shuttle and are providing the solid strap-ons for the SLS) - rather curious what they'd be doing for the B-21.
Think they had a fair bit of work on composite structures, so perhaps not so strange.