BORDER PATROL

The Border Patrol has primary responsibility for securing the border between U.S. ports of entry. On the southwest border, Border Patrol deploys agents along the immediate border and in areas up to 100 miles from the border as part of a layered approach known as the defense in depth strategy. Immigration checkpoints, generally located between 25 and 100 miles from the border, are one element of this strategy. GAO was asked to review the defense in depth strategy...