Want Alpine thrills? Try competitive paper plane flyingIf you've ever wanted to earn your wings ecologically, economically and quietly while breathing healthy Alpine air, read on, because you can. Welcome to the paper plane world championship, which Austria hosts this weekend as the erstwhile pastime of the bored schoolkid morphs into a competitive fest with a world "title" at stake. Competitors -- around 180 people from around the globe -- were able to travel ultra lightly to Salzburg with their "kit" composed of simple pieces of standard A4 size paper.