B-83 Nuclear Weapon Test

A nuclear test of the B-83 Nuclear Armament, in service from 1983 to present day, carried by multiple craft, The B-52 Stratofortress, (formerly) B-1B Lancer, (formerly) B-2 Spirit.
It is the most powerful nuclear free-fall weapon in the U.S. Arsenal (I get my sources from fandom.com, I think it's def better than wiki)