When I was in a Pershing Missile firing battalion in Germany, we took the possibility of loss of control of a nuclear weapon seriously, even attempts by the Bundeswehr. All warheads were guarded by heavily armed personnel, with adequate perimeters. All warheads were prepared for immediate destruction. The warheads should be in secure vaults, with active guards and prepared for immediate destruction.
Pershing here also. 56th FA Brigade Q R A