See the faces of the armed civilians who patrol the US border with Mexico

The US border with Mexico spans 1,989 miles.

And while US Customs and Border Protection agents are tasked with patrolling America's borders, a volunteer group of armed civilians named Arizona Border Recon intercepts people illegally crossing into the US and hands them over to authorities.

Below, are portraits taken by Cory Johnson and Neil Kremer of Arizona Border Recon members.

All photos republished with permission.