From Inside Edition.

It took a bomb squad to open a 100-year-old time capsule. In 1924, historians at Kansas City’s Liberty Memorial, now the National World War I Museum and Memorial, buried a time capsule. Along with 14 other items, a piece of 1920s film was placed in the time capsule. Film from that time was often made with nitrate, which becomes flammable as it deteriorates. The Kansas City Police Department Bomb and Arson Unit removed the time capsule and took it to a safe location where it could be unsealed.