Companies are already lining up to build the U.S.-Mexico border wall

(Chris Isidore, CNN) – Nobody knows much about the Mexican border wall — but 300 companies have already said they’d like to help build it.

Businesses will be asked to submit their proposals to design and build prototype wall structures near the United States border with Mexico starting next week, according to the Department of Homeland Security’s Customs and Border Protection agency.

Hundreds of companies have already indicated their interest in the project to the agency, which expects to award the initial contracts in April.

They range from large construction firms to small fence companies and security firms. Dozens of the interested companies say in their paperwork that they are owned by Hispanics.

But even these companies know almost nothing about the plans they’ll bid on.

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