This is the Upshot-Keyhole / Grable shot in the NTS in Nevada in 1953; it exploded 21 km downrange over the Area 5 DoomTown built on the dry lake bed. The cannon is the "Annie" Atomic Cannon. The actual pics at the beginning and the end are Grable; the stuff in the middle was of the destruction of DoomTown in the NTS in other Upshot-Keyhole tests.
This is the Upshot-Keyhole / Grable shot in the NTS in Nevada in 1953; it exploded 21 km downrange over the Area 5 DoomTown built on the dry lake bed. The cannon is the "Annie" Atomic Cannon. The actual pics at the beginning and the end are Grable; the stuff in the middle was of the destruction of DoomTown in the NTS in other Upshot-Keyhole tests.