Trooper Carl Martynuska, left, Capt. James D. Barger and Trooper Albert Vish get a radar unit ready for open house at the Butler Barracks on May 18, 1972, during National Police Week. More than 900 people attended the weeklong open house. This year's National Police Week was held May 10 to Saturday, and the 21st annual Candlelight Vigil was held Wednesday night at the National Law Enforcement Officers Memorial in Washington, D.C.