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The AD-4B was modified to carry nuclear weapons and deploy them using the toss-bombing or over-the-shoulder techniques. It was supposedly capable, but it was never tested and proved to be a political tool more than anything giving the Navy's carrier fleet nuclear abilities. It could carry a Mark 7, Mark 8, or Mark 91 nuclear bomb. See the link below for more info.

http://home.att.net/~jbaugher4/newa1_16.html