Austria is marking two big 60th anniversaries, each with wartime echoes. Last Thursday, members of the Von Trapp family returned to Salzburg for the 60th anniversary of The Sound of Music. The 1965 movie musical retold – with just a little embellishment – the singing family’s life in, and flight from, Nazi-annexed Austria. Kristina von Trapp recalled her grandmother Maria was far from the “warm and cuddly” Julie Andrews version and “definitely had an element of discipline” about her. Few Austrians noticed the movie on its original release, however, given a far bigger event looming: the first national holiday, held...