EXCLUSIVE: Fox News goes underground in El Paso to reveal the storm drain network Border Patrol says cartels use to smuggle illegal migrants into the U.S. Agen

EXCLUSIVE: Fox News goes underground in El Paso to reveal the storm drain network Border Patrol says cartels use to smuggle illegal migrants into the U.S. Agents say there are 32 entry points from the Rio Grande and hundreds of exits across the city, making it a constant game of "whack-a-mole." Wi…