America's youth builds and flies model planes on miniature flying fields. Model plane builders get their craft ready for the air at a competitive meet at Modelhaven Airport, near the City of Baltimore in the eastern U.S. state of Maryland. Every year, young model builders bring to Modelhaven, "the world's smallest airport," model planes which show astonishing improvements over previous models. Model building has long been a popular hobby among American youngsters, and model builders of other years are now putting their practical experience to use in U.S. war plants and in the armed forces. The National Aeronautics Association, through its model division, the Academy of Model Aeronautics, has founded an Air Youth Divison to bring a coordinated activity in aviation to American youngsters. Post war plans include an Inter-American Model contest, to bring the young model builders of South American countries, the U.S., and Canada into friendly competition