Ten environmental groups — Earthjustice, Sierra Club, Natural Resources Defense Council, and Southern Environmental Law Center on behalf of Sierra Club, Natural Resources Defense Council, Healthy Gulf, Center for Biological Diversity, Defenders of Wildlife, Friends of the Earth, North Carolina Coastal Federation, and South Carolina Coastal Conservation League — sued the Trump administration to challenge rollbacks of the 2016 Well Control and Blowout Preventer Rule, a safety regulation meant to prevent another blowout like what happened during the 2010 BP Deepwater Horizon disaster.