Chinese firefighters work to clean up the oil spill near the coast of Dalian, China, on Tuesday. Crude oil began pouring into the Yellow Sea after a pipeline exploded last week, and officials say the spill poses a "severe threat" to sea life and water quality. (Associated Press)

Chinese firefighters work to clean up the oil spill near the coast of Dalian, China, on Tuesday. Crude oil began pouring into the Yellow Sea after a pipeline exploded last week, and officials say the spill poses a "severe threat" to sea life and water quality. (Associated Press)