Dr. Maggie Tweddle of St. Albert, Alberta and John Tweddle of England, the daughter and son of P/O Douglas Tweddle DFC, presented the museum with a signed print of a painting depicting the loading of a Tallboy bomb aboard No. 9 Squadron Lancaster LM220 (Getting Younger Every Day). The aircraft featured in the painting was flown by their father on all three Bomber Command attacks against the Tirpitz including the final one on November 12, 1944 that was finally successful in sinking the battleship. A copy of P/O Tweddle's logbook was presented to the museum as well.
A painting of the nose art carried by the aircraft had been completed by Clarence Simonsen and was unveiled during the commemoration.
Together with Dr. John Birrell and his wife Dorothy, John and Maggie Tweddle then took part in the unveiling of the museum's Tallboy bomb. Dr. and Mrs. Birrell's donation had made the building of the Tallboy possible.