Davey Crockket?
“The B61 nuclear bomb is the primary thermonuclear gravity bomb in the U.S. Enduring Stockpile following the end of the Cold War. It is a low to intermediate-yield strategic and tactical nuclear weapon featuring a two-stage radiation implosion design.[1]
The B61 is of the variable yield (”dial a yield”) design with a yield of 0.3 to 340 kilotons in its various mods. “