sentences:  In addition to featuring futuristic technology "Flying trains, square dancing helicopters and the fantasy of a wonderland," according to a news release, Transpo '72 covered all current modes of transportation as well.General Manager William J. Bird explained, "We want to emphasize totally integrated systems in our future transportation..."
  
  The event was officially opened by the second U.S. Secretary of Transportation, John Volpe.Transpo was the idea of L. Mendel Rivers, chairman of the House Armed Services Committee.