An inside look at troops guarding the U.S.

Along the U.S.-Mexico border in Arizona, Col. Hugh Jones commands a brigade of soldiers guarding the border wall — stretching across 1,044 miles of rugged terrain.

It's part of President Trump's plan to further increase U.S. military presence at the U.S.-Mexico border. In April, Mr. Trump authorized the military to take control of a strip of public land along the southern border.

"Because we can't brute force the border or just occupy by force, we try to drive that in the smartest way we can, using a lot of the capabilities we would use in warfare," Jones told CBS News.

It's unclear how long soldiers will be deployed to the border, and Mr. Trump has not set a timeframe for the deployment.

Along the border, Chinook helicopters lifted in heavy equipment while thousands of deploye