It is not often I make a recommendation... however a friend found a set of DVDs in a charity shop in High Wycombe (still wrapped so an unwanted gift, dopey pillock!), picked it up and posted it unto me, 'cos he thought it might be of interest.
If you have the slightest interest in military or early aviation get a set of DVDs called Four Years of Thunder. It covers the whole of WWI aviation. Lots of unseen footage and it is FANTASTIC! I've watched the first three parts and I'm off to watch the fourth and final shortly 8) The wife ain't all that happy but I am 8) 8) 8)