U.S. Army Lt. Col. Patrick Dagon, the deputy commander of U.S. Army Corps of Engineers Nashville District, introduces Vicki H. Metzgar, left, the Science, Technology, Engineering and Mathematics (STEM) director of the Middle Tennessee STEM Innovation Network during a Women's History Month event in the district headquarters at Nashville, Tenn., March 26, 2013. Metzgar was a guest speaker at the event. (U.S. Army photo by Leon Roberts/Released)