SAN DIEGO (AP) - A U.S. official says rigorous testing of prototypes of President Donald Trump's proposed wall with Mexico has found their heights should stop border crossers.
Military special forces based in Florida and Customs and Border Protection special units spent three weeks trying to breach and scale the eight models in San Diego, using jackhammers, torches and other tools.
An official with direct knowledge of the results said they point to see-through steel barriers topped by concrete as the best design. But the official says a report on the testing of each design does not pick an overall winner or rank them.
The official spoke to The Associated Press on condition of anonymity because the information is not authorized for public release.
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