US hands out first contracts for border wall prototypes

Four companies have been chosen to build prototypes for Donald Trump's planned border wall, US Customs and Border Protection (CBP) said. The four concrete prototypes will be 30ft (9m) long and up to 30ft tall, and will be built in the coming months. Officials will then spend up to two months testing the walls for tampering and penetration resistance using small hand tools, CBP said.
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