As state police paid tribute to fallen troopers Monday morning, they made sure photographs, reports and other information also would not be forgotten. State police placed a time capsule behind a monument for fallen members at their annual Memorial Day services outside the front entrance of the Troop D headquarters in Oneida, Trooper Jack Keller said. The ceremony is held each year to remember and honor 24 Troop D members who have given the "ultimate sacrifice," Keller said. About 150 people attended Monday. State police Maj. Mary Clark, who previously served as a Zone 1 Commander captain, spearheaded the idea of a centennial time capsule. "The entire troop -- troop headquarters, zone stations and Bureau of Criminal Investigation units -- were notified and requested to provide some form of a portfolio containing interesting, noteworthy events, photographs, reports or whatever they thought would speak more clearly in the future, as compared to a historical study or verbal story sharing," Keller said. State police submitted items throughout 2017 "in a collective effort to compile a historical cache of goods and information," he said. "A few members took time to draft letters, in hope of same being read by family and relatives in the future." Items were placed inside a waterproof fiberglass time capsule, constructed by Zone 1 Commander Capt. Mark Klosowski; other members from Troop D also assisted. Members of the state police signed the outside of the time capsule, which Keller said, instructs future generations not to open it until at least the year 2067.