Ключевые слова: barbed wire, barrier, border barrier, border conflict, border control, border crossing, border enforcement, border fence, border issues, border patrol, border policy, border restriction, border security, border separation, border surveillance, border tensions, border violation, border wall, boundary, controversial, customs and border protection, defense, deterrent, dividing line, division, enforcement, entry point, fencing, fortification, government, homeland security, immigration, immigration policy, metal, migrant crisis, national security, perimeter, politics, protection, restricted access, restricted area, safety, secure, secure border, security measures, southern, trespassing, unauthorized entry, us border, wall,