No. 844 was the last steam locomotive built for Union Pacific Railroad and was delivered in 1944. A high-speed passenger engine, it pulled such widely known trains as the Overland Limited, Los Angeles Limited, Portland Rose and Challenger.
No. 844 has run hundreds of thousands of miles for UP's Heritage program. It has made appearances at Expo '74 in Spokane, the 1981 opening of the California State Railroad Museum in Sacramento, the 1984 World's Fair in New Orleans and the 50th Anniversary Celebration of the Los Angeles Union Station in 1989.
http://www.youtube.com/watch?