Taft and Harding each made one international trip while president. Taft and Mexican president Porfirio Díaz exchanged visits across the Mexico–United States border, at El Paso, Texas, and Ciudad Juárez, Mexico, in October 1909. While filled with much symbolism, the meetings did pave the way for the start of construction on the Elephant Butte Dam project in 1911, even as Mexico fell into revolution. Harding made an official visit to Vancouver, British Columbia on July 27, 1923 (six days prior to his death). Greeted dock-side by the premier of British Columbia and the mayor of Vancouver, he was given a parade through the city to Stanley Park, where he spoke to an audience estimated at over 40,000.