Donald Brubaker was born in Kitchener, Ontario, graduated from high school in June 1940, and joined the RCAF two months later. During May 1941, he received his pilot wings at 3 Service Flying Training School in Calgary.

Francis Capstick was born in Capstick, Nova Scotia, a small village at the northern tip of Cape Breton Island. He enlisted in the RCAF during July 1940 and graduated as a Wireless Operator/Air Gunner, his wireless training having been completed at 2 Wireless School in Calgary.

Both P/O Brubaker and Sgt. Capstick were posted to 149 Squadron RAF that was flying twin-engined Wellington aircraft. After taking off from their base at Mildenhall on 20 October 1941 on a raid to Bremen, their aircraft, Wellington Z8795 (OJ-C), crashed into the Scheldt River in Belgium. All six aboard the Wellington, including the two Canadians, were killed.

At some point following the deaths of P/O Brubaker and Sgt. Capstick, it was incorrectly recorded that they were part of 145 Squadron -a fighter unit that flew Hurricane and Spitfire aircraft. So when the initial list of Canadians killed while serving with Bomber Command was prepared for Canada's Bomber Command Memorial Wall in 2005, the names of Donald Brubaker and Francis Capstick did not appear. They had, "Fallen through the cracks of history."

During 2022, Donald Brubaker's niece Anneliese and her family from Hamilton, Ontario visited the museum, expecting to see her uncle's name on the Memorial Wall. Disappointed, she contacted the museum.

Anneliese's inquiry and other information that was not available in 2005 led to detailed research by museum volunteers. During April 2024, the museum engraved the names of 191 airmen onto the Memorial Wall. They all, like Anneliese's uncle and Sgt. Capstick, had "Fallen through the cracks of history."