A Department of Public Safety Trooper is parked near concertina wire set up along the Rio Grande close to the Texas-New Mexico border in El Paso on Tuesday.

Source: https://www.rawstory.com/texas-strings-concertina-wire-along-new-mexico-border-to-deter-migrants/

Chain link fence and concertina wire surrounds a deserted guard tower within Joint Task Force Guantanamo's Camp Delta at the U.S. Naval Base in Guantanamo Bay, Cuba March 21, 2016.

Source: http://www.srilankaguardian.org/2023/03/pakistani-brothers-finally-leave.html

In Jessie Fuentes’ hometown of Eagle Pass, he sees concertina wire and a floating barrier outfitted with serrated blades on the river where he grew up.

Source: https://www.latimes.com/delos/story/2023-10-02/tlatelolco-massacre-matanza-55th-anniversary