The Dept. of Homeland Security has awarded eight contracts to companies to develop prototypes for the Trump administration’s proposed wall along sections of the nearly 2,000-mile U.S.-Mexico border.

The federal government has raised the limit on visas for temporary or seasonal workers in nonagricultural industries by as many as 15,000, or 23%, but employers seeking them must state, under penalty of perjury, that their businesses are “likely to suffer irreparable harm” without the new workers.