Wikipedia: In early 1945 a Ju 388 was intercepted while flying at approximately 13,410 m (44,000 ft) over the English Channel by a Supermarine Spitfire. The Spitfire, operating above its service ceiling, was not able to reach the altitude of the Ju 388 but was able to fire upon it from below and bring it down. It is believed that this was the highest altitude shoot down of WWII.
That’s a fair question and one that in recent weeks has been much on my mind.
Ah , the ones that not so much fly as plummet
403
This was the first Canadian squadron formed overseas that had no ties to any previous flying unit. Created on 1 March 1941 as No. 403 Army Cooperation (AC) Squadron equipped with the Curtiss Tomahawk.