Weapons
 The Moscow Treaty, which was signed in 2002, will reduce the number of U.S. and Russian operationally deployed strategic nuclear warheads to 1,700 to 2,200 by 2012. Currently, the overall stockpile, both operationally deployed and those held in reserve, is the smallest it has been since the Eisenhower administration.
The last nuclear weapon in the current stockpile was produced in 1991. President George H.W. Bush instituted a moratorium on conducting underground nuclear tests in 1992. This moratorium has been renewed by each President since.
The total number of nuclear weapons and the quantity of each type of weapon in the U.S. stockpile is classified for national security purposes.
| Weapon |
Type |
Delivery System |
Primary Use |
Service |
Entered Stockpile |
| W62 |
ICBM |
Minuteman III |
Surface to Surface |
Air Force |
1970 |
| W78 |
ICBM |
Minuteman III |
Surface to Surface |
Air Force |
1979 |
| W87 |
ICBM |
Minuteman III |
Surface to Surface |
Air Force |
1986 |
| W76 |
SLBM |
Trident I (C4)
Trident II (D5) |
Underwater to Surface |
Navy |
1978 |
| W88 |
SLBM |
Trident II (D5) |
Underwater to Surface |
Navy |
1989 |
| B61-3/4/10 |
Bomb |
F-15, F-16 |
Air to Surface |
Air Force |
1979/1990 |
| B61-7/11 |
Bomb |
B-52H, B-2A |
Air to Surface |
Air Force |
1985/1996 |
| B83 |
Bomb |
B-52H, B-2A |
Air to Surface |
Air Force |
1983 |
| W80-0/1 |
Missile* |
SSN Submarine
B-52H |
Underwater to Surface
Air to Surface |
Navy
Air Force |
1984/1982 |
ICBM = Intercontinental Ballistic Missile
SLBM = Submarine Launched Ballistic Missile
* The W80-0 is designed to be launched on a Tomahawk Land Attack Missile (TLAM) from a SSN Attack Submarine. The W80-1 is desinged to be launched on an air-launched cruise missile from a B-52H bomber.
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