U.S. officials say the Pentagon is readying deployment of nearly 1,000 additional active duty troops to bolster President Donald Trump’s crackdown on immigration, including dozens of Marines working to bolster the border wall separating San Diego from Tijuana, Mexico. (AP Video by Eugene Garcia)

Marines use Osprey aircraft and concertina wire to fortify the border wall

U.S. officials say the Pentagon is readying deployment of nearly 1,000 additional active duty troops to bolster President Donald Trump’s crackdown on immigration, including dozens of Marines working to bolster the border wall separating San Diego from Tijuana, Mexico. (AP Video by Eugene Garcia)