As the Mark 13 neared production , advances in thermonuclear weapon design , particularly the Ivy Mike thermonuclear test in November 1952 , made the Mark 13 obsolete . Development continued for research purposes ( the Upshot-Knothole Harry test shot came months after the first thermonuclear test in Ivy Mike ) , and in two variant designs , but the Mark 13 proper was never deployed . The Mark 13 bomb version was cancelled in August 1953 , and the W-13 warhead version was cancelled in September 1953
Ivy Mike
Ivy Mike
Mark 13 nuclear bomb