Palm trees frame the clean modernist lines of the IMSS (Instituto Mexicano del Seguro Social) building in Mexicali, Baja California — Mexico's bold mid-century experiment in social welfare architecture, brought to the sun-drenched border city that faces Calexico, California across the fence. The Mexfotocolor chrome bathes the scene in saturated turquoise sky and deep green fronds, with a handful of pedestrians strolling the wide plaza, a bicycle leaning casually at left. The gold border and "Saludos desde Mexicali, B.C. México" greeting printed in script across the sky mark this as a souvenir greeting card, the kind sold in lobbies and border curio shops to Americans crossing over for a day trip in the 1960s.