There has been a derailment near Knoxville, TN today involoving Norfolk Southern. The NS train had two locomotives and 24 cars, sulfuric acid is believed to have been spilled. Here is a story with more information from MSNBC.
Check that 24 cars derailed of 141 in the consist. No major injuries have been reported, and 100 homes within a mile of the accident have been evacuated.