I did not take the escape ladder to the surface, but I am told it pops up in the middle of a hill next to the missile silo doors.
North of the assembly complex is a storage network of earthen and concrete bunkers.
One of the many blast doors. Note the plunger to seal off the airflow in the event of an attack or accidental explosion.
This heavy door opens directly into the missile vault and was used to load and unload the missile erector.
One of the storage bunkers was cracked open. I wonder how effective this heavy door would actually be… I expect, not very.