The great wall in US-Mexico border is a project for the construction of an enormous wall between the US and Mexico territories. President Donald Trump, one of the promoter of the plan, has described the wall as "impenetrable, physical, tall, powerful, beautiful, southern border wall" in the border. It is aimed to prevent illegal crossings from Mexico into the United States The line of the frontier is aproximately 1,900 miles (3,100 km) long and cut across all types of terrain. Mr Trump says his construction will envelope 1,000 miles and natural obstructions will guard the rest portions. As of January 2009, U.S. Customs and Border Protection reported that the border fences had more than 580 miles (930 km) of barriers in place.