In recent years, the animal liberation group Direct Action Everywhere has carried out some of the most brazen and tech-savvy operations and investigations to ever target the animal agriculture industry. It has rescued pigs, goats, ducks, and chickens from factory farms and slaughterhouses in midnight intrusions; captured virtual reality footage with custom-built 360-degree video rigs inside massive pig barns; and used hidden cameras to record some of the meat industry’s most disturbing practices, from the carbon dioxide gas chambers that are increasingly used in pig slaughterhouses to the “ventilation shutdowns” designed to cull thousands of farm animals through overheating and suffocation.

Source: Wired – Threat Level