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===Strategic Defense Initiative===

===Strategic Defense Initiative===

The Strategic Defense Initiative (SDI), which began development under the [[Ronald Reagan|Regan]] administration, was thought by some groups, especially the Union of Concerned Scientists, to represent a destabilization of MAD.

The Strategic Defense Initiative (SDI), which began development under the [[Ronald Reagan|Regan]] administration, was thought by some groups, especially the Union of Concerned Scientists, to represent a destabilization of MAD.  The reasoning behind this was essentially the same as that of the ABM dilemma above.

===First Strike Capabilities===

===First Strike Capabilities===

"First Strike" systems are those which either preserve a fatal second strike component, or entail independent & undetectable first strike systems.  '''"SLBMs"'''', or submarine-launched ballistic missiles, are one time of first strike system employed heavily by the United States.  The USSR, in the Cold War, employed '''"RLBMs"''', or rail-mounted ballistic missiles, which is to say that the USSR would use their massive railway system to furtively move and conceal a potent first strike or deterrent system.

"First Strike" systems are those which either preserve a fatal second strike component, or entail independent & undetectable first strike systems.  '''"SLBMs"'''', or submarine-launched ballistic missiles, are one time of first strike system employed heavily by the United States.  The USSR, in the Cold War, employed '''"RLBMs"''', or rail-mounted ballistic missiles, which is to say that the USSR would use their massive railway system to furtively move and conceal a potent first strike or deterrent system.