Another interesting feature is that nuclear weapons that were withdrawn from two
German bases, two Turkish bases, and one Italian base in the mid 1990s were not
returned to the United States but transferred to the main U.S. base in those countries. In
Germany, the weapons were moved from Memmingen Air Base and Nörvenich Air Base
to Ramstein Air Base. In Turkey, they were moved from Akinci Air Base and Balikesir
Air Base to Incirlik Air Base, and in Italy, the weapons were moved from Rimini Air
Base to Ghedi Torre Air Base. These transfers appear to have been a consistent pattern:
Nuclear weapons were not withdrawn from the European theater when a U.S. Munitions
Support Squadron (MUNSS) was inactivated at national bases, but instead were moved to
the main U.S. operating base in each country. In all of these cases, the weapons continue
to be earmarked for “host nation use” and delivery by the national air forces.
In the case of Ghedi Torre Air Base, the situation is particularly noteworthy because the
base’s utilized weapons storage capacity is nearly double that of the other national bases.
Out of a maximum capacity of 44 weapon spaces in 11 vaults at Ghedi Torre, roughly 40
(more than 90 percent) are filled. It is the only known case in Europe where a national
air base stores more than 20 nuclear weapons. Half of the weapons at Ghedi Torre were
previously stored at Rimini Air Base, which ended nuclear operations in 1993. It is
unclear whether this means that the 6th Stormo Wing at Ghedi Torre has a particularly
large nuclear strike mission, or that another Italian wing also has a nuclear role.
The deployment of U.S. nuclear weapons on the territories of European countries is
arranged by a series of secret nuclear agreements between the United States and each host
or user country. The nuclear agreements fall into four categories:6
The Atomic Stockpile Agreement is a bilateral agreement between the United
States government and a user nation. It guides introduction and storage within a
country, custody, security, safety and release of weapons, as well as cost sharing.
The Atomic Cooperation Agreement is a bilateral agreement between the United
States and a user nation that provides for the “Exchange of Atomic information
useful for mutual Defense Purposes.”
The Service-Level Agreement is a bilateral technical agreement between the
military services of the United States and the user nation. It implements the
government-to-government stockpile agreement and provides details for the
nuclear deployment and use and defines joint and individual responsibilities.
“Third party” stockpile agreements are government-level agreements between the
United States, third nation and user nation. It guides stockpiling of nuclear
weapons within the territory of a third-nation for the use by NATO committed
forces of a signatory user nation.
Between 1952 and 1968, a total of 68 individual nuclear agreements were signed between
the United States and nine NATO countries. By 1978, 53 of those agreements remained
in effect, including nine service-to-service technical agreements governing the
deployment of U.S. Air Force nuclear bombs in as many countries (Belgium, Canada,
Germany, Greece, Italy, Netherlands, Turkey and the United Kingdom).
Canada left NATO’s surrogate nuclear club in 1984, apparently followed by Greece in 2001.
As a result, nuclear agreements today are in effect with six NATO countries: Belgium,
Germany, Italy, Netherlands, Turkey, and United Kingdom. The code words for some of
the technical agreements (Service-Level Agreements) for the NATO countries that
currently store U.S. nuclear weapons are known: Pine Cone for Belgium; Toolchest for
Germany; Stone Ax for Italy; and Toy Chest for the Netherlands.8
Underground Nuclear Weapons Storage Logistics
The B61 nuclear bombs in Europe are stored in what is known as the Weapon Storage
and Security System (WS3), a nuclear weapons storage capability unique to the European
theater. This system enables the weapons to be stored underground in Weapons Storage
Vaults (WSV) inside the individual Protective Aircraft Shelters (PAS)9
on each base rather than in igloos in a centralized Weapons Storage Area (WSA). There are currently
204 WSVs in Europe, with a total capacity of 816 weapons (see Table 4).
Until now most independent analysts have assumed that each vault could store up to two
weapons. But declassified documents disclose, as do careful analysis of photographs of
the vaults published by the U.S. Air Force and Sandia National Laboratories (SNL)
(reproduced below), that each vault can store up to four weapons. In reality, however,
most bases utilize only part of their maximum capacity. The one exception is Ghedi
Torre Air Base in Italy, which stores 40 weapons in 11 vaults with only four spares (see
Appendix A).
The WS3 program started in 1976 when SNL began a “forward look” study to determine
how to better safeguard nuclear weapons deployed in overseas locations. At that time,
nuclear weapons were stored in igloos in a double-fenced WSA at the base. In 1979, the
effort produced a capability study on how to disperse the weapons for storage in the
hangars themselves. Full-scale development of the four-weapon vault system began in
September 1983, and Research, Development, Test, and Evaluation (RDT&E) was
carried out at Ramstein Air Base in November and December 1987. The program
entered production and deployment phase in August 1988 with a contract awarded to
Bechtel International Inc. The first location to achieve Initial Operational Capability
(IOC) was Büchel Air Base in September 1990. Incirlik Air Base was the last, in April
1998. Originally, 249 vaults were built at 15 sites in seven countries (see Appendix B).10
The WS3 system is made up of five functional areas:
The WSV, the mechanical portion of the WS3, is a reinforced concrete foundation and a
steel structure recessed into the floor of Protective Aircraft Shelters (PAS). The vault
barrier, barrier support, midlevel deck, and platform assembly are designed to be elevated
out of the concrete foundation by means of an elevator drive system to provide access to
the weapons in two stages or levels, or to be lowered into the floor to provide protection
and security for the weapons. The floor slab is approximately 16 inches thick. Sensors to
detect intrusion attempts are imbedded in the concrete vault body. A fully configured
WSV will store up to four nuclear weapons (see Figures 3 and Figure 4).11
The WS3 was originally envisioned to be a global system deployed at U.S. Air Force
bases where the U.S. deployed nuclear weapons overseas. A total of 437 vaults with a
maximum capacity of more than 1,700 weapons were initially planned for 28 locations
worldwide (36 vaults were planned for Kunsan Air Base in South Korea). Of these, 401
were in Europe with a combined capacity of 1,604 weapons. The scope of the program
was scaled back considerably, as were the number of WSVs at each base. In 1997, there
were 249 sites with a capacity of 996 weapons (even though only approximately 520 U.S.
and U.K. weapons were present) in Europe. Today, there are 204 vaults with a maximum
capacity of 816 weapons – nearly double the number of weapons actually deployed (see
Appendix A and Appendix B).