Prototypes for Trump's U.S.-Mexico border wall

President Trump defended his plan for a wall along the U.S. southern border on Thursday after White House Chief of Staff John Kelly said some of the immigration policies Trump touted during the campaign — including the wall — had “changed.”

“The Wall is the Wall, it has never changed or evolved from the first day I conceived of it,” the president tweeted. “Parts will be, of necessity, see through and it was never intended to be built in areas where there is natural protection such as mountains, wastelands or tough rivers or water.”

Here’s a look at eight prototypes constructed in Otay Mesa in San Diego, Calif., by six contractors competing to build Trump’s ”Big Beautiful Wall.”

See FULL STORY by Dylan Stableford/Yahoo News

See more news-related photo galleries and follow us on Yahoo News Photo Twitter and Tumblr.