30-foot Border Wall Begins Construction In California

A section of border wall is constructed on the U.S. side of the border in Tijuana, Mexico, on Jan. 28, 2019. Scott Olson/Getty Images

Several days after President Donald Trump declared a national emergency, construction began on the fifth border wall project of his administration.

The U.S. Customs and Border Protection announced Tuesday that work has started on replacing 14 miles of a steel-mesh fence along the U.S.-Mexico border near San Diego, The Associated Press reported. The fence is being replaced with 30-foot high steel bollards. It is actually the second layer of barrier to be put up in the area, with the first layer nearly complete.