President Biden has nominated a critic of the Trump administration’s immigration policies to run U.S. Immigration and Customs Enforcement, one of the federal government’s most polarizing agencies.

The grainy Border Patrol video of the Mexico border shows what looks like an adult atop a 14-foot barrier with a toddler, who is hoisted over the side and dangled by one arm before being dropped to the ground far below. The same then happens with a second child.