There were three guardhouses at Lower Site Summit. Sentry Station 1 (similar to this one) is located outside the fence and was manned when the Site was on "hot status" to limit access. Sentry Station 2 (this series of photographs) stands between the restricted area and the exclusion area which required 24 hour security because this was where the missiles were housed. Sentry Station 3 a.k.a. Log Cabin Guardhouse stood in the road and controlled access to both Lower and Upper Sites.