Bobber, the Tulsa District, U.S. Army Corps of Engineers water safety dog, waves to children along the parade route at the 38th annual Martin Luther King Jr. Commemorative Parade in Tulsa, Okla., January 16, 2017. Personnel from the Tulsa District have been participating in the city of Tulsa's MLK Day parade for more than 20 years. (U.S. Army Corps of Engineers photo by Preston Chasteen/Released)