B2 doesn’t need an “A” in its name. There’s no B2B after all, just one version. It’s like calling yourself “senior” when you don’t have a son! By the way, the B21 may be in low rate production, but it’s far from being done in testing, and it’ll be several years before being combat ready, no sooner than 2026 or 2027 most likely.
The similar missions have been done by B-52 many years ago when B-52 flew at sea level to escape shore radars detection from Guam to Persian Gulf, stopped at Garcia Diego to refuel. B-52 used to fly at sea level from Guam to near Vietnam coast then rose to 20,000 ft for bombing mission in late 1960s. This is NOTHING NEW !!! B-36, TU-9 and H-6K also did the same sea level long distance flights with their extra long wide wings. 🤔🤨🙄😆😎