The U.S. southern border with Mexico has hundreds of kilometers of high fencing, with more planned, but there is little to mark parts of the U.S. northern border.

• 美国的南部边境同墨西哥相连，有着几百公里的高高的栏栅，要比计划中的还要多，但是在另外一头美国的北部边境则非常的少。