19 September 20194.25 "A formidable project". Thus President Trump called the Wall on the border with Mexico that he signed during his visit to a border area south of San Diego. "I always imagined a concrete wall, it would have been easy to make" but even this metal barrier "is impossible to climb over and even if an athlete could do it the landing would be very painful", he said. The Wall was designed to absorb heat so as to make its climbing prohibitive