Those are obsolete. The US now has nukes 1000x the power of those dropped and has been reported and confirmed to world council.
Don’t forget the US has to be inspected yearly by the nuclear council on how many active and working nukes they have and the yield on them ( 3,750+ active ready to go by the way. Confirmed by neutral council INCLUDING Chinese reps). They also have 1700+ awaiting dismantling and 800 new ones to be built (or updated if decommissioned ones are found viable)
The United States does not field nukes even in the 1 megaton range that is the standard Chinese Nuclear warhead.
The United States nuclear arsenal is currently just whatever agreed upon amount of ICBM, and SLBM, which Russia pulled out of years ago.
The Minuteman 3 missiles are currently deployed according to published information with single 400 kiloton warheads per missile.
The Trident 2 missiles there isn't much public info on what the load out is, but that doesn't matter anyways because none of our submarines are even armed.
We are outclassed in our Nuclear arsenal by China alone, and the new ICBM for 2035 isn't going to carry any more payload, its just a re-spin of the minuteman 3 that ended production 50 years ago.