We crossed back into Mexico at Nogales, Mariposa gate at around 10 am in the car. Nothing going on, light traffic. As is frequently the case. the toll booth just south of Magdalena was manned by teen agers or 20 somethings. Not aggressive or pushy, likely not cartel people. We rolled through and kept our coin. The cold front that came through on Monday took temps down near freezing after 100° F temps the previous week.