Union Pacific Big Boy No. 4014

Spectators take pictures the historic locomotive, Union Pacific Big Boy No. 4014 at Metrolink Station in Covina, Calif., on Sunday, Jan., 26, 2014. The locomotive will head for Colton over the next several weeks before No. 4014 departs for Union Pacific's Heritage Fleet Operations headquarters in Cheyenne, Wyo.. The Union Pacific Big Boy No. 4014 is one of the most famous locomotives in the world today. It is the heaviest single expansion steam locomotive ever built, weighing about 1,200,000 pounds. The Big Boy class was designed for heavy freight service and was used between Ogden, Utah, and Cheyenne, Wyo. Built in 1941, No. 4014 was retired in 1959 after only 18 years of service. No. 4014 arrived at the Pomona Fairgrounds in January 1962. In the summer of 2013, Union Pacific reacquired Big Boy No. 4014 and plans to restore it for operation as part of its world renowned steam program. (AP Photo/Ringo H.W. Chiu)