America's youth builds and flies model planes on miniature flying fields. Model planes of all types and sizes are being tuned up by their owners for a competitive meet at Modelhaven Airport, near the City of Baltimore in the eastern U.S. state of Maryland. Although fewer participants have turned up in the past few years, because of the numbers now serving in the armed forces, young model builders bring to Modelhaven, "the world's smallest airport," many model planes which show astonishing improvements over previous models. Thes young model builders will put the knowledge of aeronautics gained in home and school workshps to good use in the air-minded post-war world. Courses in aeronautics have recently been added to the curriculum in many U.S. high schools