National Geographic : 1936 Oct
"ON TO GUADARRAMA!" SHOUT Photograph byAcme VOLUNTEERS, AS CITIZENS OF MADRID GIVE THEM THE LOYALIST SALUTE WITH CLENCHED FISTS Their overladen bus lurching through the Puerta del Sol in the heart of the city, this contingent is bound for theSierra deGuadarrama, northwest oftheCapital, where Government forces held a vital mountain pass against attacking rebels. In happier days Madrid's central plaza was filled with animated crowds ofshoppers, sight-seers, and cafe habitues. The Ministry of the Interior occupies the building at the left.