An American is flag hung in front of Saint Patrick Church in Washington, D.C. by the metropolitan fire department in observance of the Fourteenth Annual Blue Mass held May 6. The mass paid special tribute to 24 law enforcement officers from the metropolitan area that died in the line of duty, including six members of the Air Force Office of Special Investigations. Those members were: Special Agents Ryan Balmer, Matthew Kuglics, Thomas Crowell, Nathan Schuldheiss, David Wieger, and Michael Thyssen. (U.S. Air Force photo/Capt. David Wilson)