2 .NA harden "Place missiles into protective silos"
4 .SY "harden <PLANES> <LEVEL>"
5 The \*Qharden\*U command is used to install missiles
6 into protective silos which can prevent their destruction
7 during a nuclear or non-nuclear
9 Each successive \*Qharden\*U command
10 will add to the current hardness level of the missile in question.
12 Each point of hardening uses one unit of heavy construction materials,
15 Once a missile has been placed in a silo
16 (hardened to a level greater than 0)
17 it can no longer be moved.
19 .SA "launch, Nuke-types, Plane-types, Planes, Nukes"