People 15 Disturbing Photos Reveal 7,000 Migrants Heading to The US Border C.C. 0 In recent years, security has been heightened on the US side of the 3,000-mile-long border. This is a tunnel used by US Border Patrol along the Arizona-Sonora border between the US and Mexico. Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 <1 ... 1415 16