About 10:38 p.m., central daylight time, on October 21, 2002, westbound Union Pacific Railroad (UP) train MPRSS-21 struck eastbound UP train AJAPRB-21, which was moving through a crossover at Norma Interlocking in Des Plaines, Illinois. The lead 3 locomotives of the striking train, as well as 6 cars positioned 20 cars behind the locomotives, derailed. Three cars of train AJAPRB-21 derailed, and three others were damaged. About 5,000 gallons of diesel fuel from the derailed locomotives spilled onto the ground. The two crewmembers of the striking train sustained non-life-threatening injuries. Damages were $1.02 million.