The Netherlands ratified the
Nuclear Non-Proliferation Treaty (NPT) on 2 May 1975. In the past (1960s till 1990s), the Netherlands took part in the deployment of
NATO nuclear artillery shells for its self-propelled howitzers and missile artillery units. These 8 inch shells and warheads for
Honest John, and later
Lance, missiles were stored at the special ammunition stores at
't Harde and
Havelterberg. These weapons are no longer operational. being shown a disarming procedure on a dummy at
Volkel Air Base.Until 2006,
Royal Netherlands Navy P-3 Orion aircraft, and their predecessors the
P-2 Neptunes, based at former Naval Air Station Valkenburg in
Katwijk and
Curaçao in the
Caribbean were assigned U.S. Navy
Nuclear Depth Bombs (NDB) for use in anti-submarine warfare. These weapons were originally the
Mk 101 Lulu, which yielded 11 kt; later, they were replaced by the Mk-57 (also referred to as the
B-57). The NDBs were stored under U.S. Marine guard at
RAF St. Mawgan,
Cornwall, UK, which also held 60 similar weapons for the use of
RAF Shackleton and
Nimrod aircraft. The storage arrangements were agreed in 1965 between the
British Prime Minister Harold Wilson and
President Johnson in a secret memorandum now declassified in the UK archives. At present (2008), the
USAF still provides 22 tactical
B61 nuclear bombs for use by the Netherlands under the
NATO nuclear weapons sharing agreement. These weapons are stored at
Volkel Air Base and, in time of war, they may be delivered by
Royal Netherlands Air and Space Force F-35 warplanes. (The Dutch government has never formally admitted or denied the presence of these weapons, but former prime ministers
Dries van Agt and
Ruud Lubbers both acknowledged their presence in 2013.) The U.S. insists that its forces control the weapons and that no transfer of the nuclear bombs or control over them is intended "unless and until a decision were made to go to war, at which the [NPT] treaty would no longer be controlling", so there is no breach of the NPT. ==Dutch production of precursors to chemical weapons==