Straight out of G.I. Joe’s classified files (or issue #4 of the G.I. Joe comic, published in 1982) comes a not-for-prying-eyes cross section of the Joe’s secret base. The five-level underground complex…

Straight out of G.I. Joe’s classified files (or issue #4 of the G.I. Joe comic, published in 1982) comes a not-for-prying-eyes cross section of the Joe’s secret base. The five-level underground complex…