Our friend and colleague Alfonso Salazar, a UFO researcher and aviation expert whose accounts have been featured over the years, shares with us these vintage photographs from the defunct Contactos Extraterrestres magazine. "The incident took place on July 29, 1977, when a UFO crashed into the Puebla mountain range. The Mexican military conducted a search and photographs of the object's remains were displayed for the first time," writes Mr. Salazar, who is working on a book about this fascinating moment in history.Map showing the location of Jopala in the Mexican state of Puebla (20.1628° N, 97.6928° W)