Employees from the Tulsa District, U.S. Army Corps of Engineers, march through the city streets during 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)