Apologies if this has already been posted but for those in the UK the 20-year-old BBC Decisive Weapons episode of the same name is available on iPlayer for another couple of weeks. Link: http://www.bbc.co.uk/iplayer/episode/b0078dxf/decisive-weapons-series-1-3-the-p51-cadillac-of-the-skies. It’s a great watch.