1 dead, 2 unaccounted for after explosion at US Steel plant in Pennsylvania
1. An explosion at US Steel's Clairton plant injured dozens and killed at least one. 2. The Clairton plant is the largest coking factory in the U.S. 3. Past incidents include a damaging fire in 2018 and an explosion in 2010. 4. Two people remain unaccounted for amid ongoing emergency response efforts. 5. Local residents have been advised to stay indoors due to safety concerns.