Border Patrol says 32 underground entry points from Mexico lead to exits in elementary schools, parks and backyards across El Paso neighborhoods.
https://www.foxnews.com/us/inside-underground-el-paso-storm-drain-system-border-patrol-says-cartels-exploit-smuggle-illegal-migrants
https://www.foxnews.com/us/inside-underground-el-paso-storm-drain-system-border-patrol-says-cartels-exploit-smuggle-illegal-migrants