Joe 4
Joe 4 is an aerial bomb or ammunition model.
Overview
1953 Soviet atmospheric nuclear test.
In detail
Joe 4 is an aerial bomb or ammunition model.
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“RDS-6s”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q2582085: Joe 4
Consult the source