Currently the United States of America have a "triad" of ground-based ICBMs,
submarine launched ballistic missiles, and air-delivered free-fall bombs.
Land based ICBMs
Currently the US Air Force has approximately 450 Minuteman III ICBMs. The USA
have phased out all peacekeeper ICBMs and destroyed all their Minuteman II, in
accordance with the START II treaty. Although the Minuteman III was designed to
have a MIRV capability, the system carries a singular warhead for treaty compliance.
The Minuteman carries the W62 warhead.
The US Air Force currently has a strategic bomber group of approximately 100 B-52
Stratofortress and approximately 20 B-2 Spirit aircraft.
It is possible to arm the B-2 and B-52 with variable yield B61 or B83 free-fall bombs
It is possible to deliver the B61 and B83 free fall with use of a range of other aircraft.
These include the F-15E, F-16A, B, C, D, F/A-18A, B, C, D, E, F and F-22A
Submarine Launched Ballistic Missile (SLBM)
The US Navy has 14 Ohio-class submarines,
each armed with: