Dozens of Marines unfurled coils of concertina wire — one on the ground and one slightly above — making it more difficult to climb a border wall separating Tijuana from San Diego. They worked with speed and efficiency amid a weekend rush of cars nearby at the busiest border crossing between the U.S. and Mexico.
Fortifying barriers has long been a military task on border missions that date back to the administration of George W. Bush. But President Donald Trump has hinted strongly at the unprecedented use of the armed forces to repel what he calls a “disastrous invasion.”
