I am a fan of both Jimmy Stewart and his movies. I did not realize Miller was only 30, born in 1914 shot down 1944. I always assumed Miller was a older guy like Stewart..
Actually Glenn Miller was born in 1904 in Clarinda, Iowa. He died at the age of 40. By the way, Jimmy Stewart was born four years later than Glenn Miller, so he was in his mid-40's when "The Glenn Miller Story" was being made.