Dallas Barfield, U.S. Army Corps of Engineers Nashville

Dallas Barfield, U.S. Army Corps of Engineers Nashville District lock operator at Kentucky Lock, Grand Rivers, Ky., closely watches his monitor July 16, 2013 as motor vessel “Miss Katie” and its tow with the 50-foot electromagnetic particle ring Muong-2 are lowered to tailwater level en route to Chicago. The Muong-2 is a very powerful electromagnetic ring capable of carrying 5,200 amps of current and it creates a very strong magnetic field that allows storing a special particle called a muon. For additional information on the Muon g-2, and how the Nashville District contributed to its journey, go to http://www.npr.org/2013/07/02/197719271/15-ton-particle-ring-travels-to-chicago-by-land-and-by-sea>.