Today is the deadline for contractors to finish prototypes for President Trump’s so called border wall, and an Alabama company is among them. The Caddell construction company in Montgomery has two designs for the wall to be built along the U.S. border with Mexico. One has a thick base and a concrete upper wall. The other design has a see through top half and a solid bottom half. Competing designs from Texas, Pennsylvania, and Arizona are in the mix for the job. A private company will begin testing the prototypes in November.