Interstate 4's deadly pileup claimed its fourth life this afternoon. Disney officials confirmed that one of its employees died in the accident. Darren Scott Snyder worked in engineering services on the maintenance team at the Animal Kingdom. And nearly 12 hours after multiple cars and tractor trailers slammed into each other, forcing the highway's closure, authorities could not say when it would reopen. (Find routes around the closed area.) Investigators continue to pick through and examine the two miles of mangled vehicles. Miles away, Division of Forestry officials were looking into a 10-acre controlled burn that escaped firefighters, expanding to 400 acres and billowing thick smoke into the air. That smoke plus fog that rolled into the area are believed to have cut visibility for motorists along I-4 early this morning. Ten accidents involving 70 vehicles killed four people and injured 37 others. Five of them are in critical condition, according to FHP. The largest of the...