Since 1970, Oshkosh, Wisconsin has hosted EAA AirVenture, the world’s largest air show. Over 10,000 planes land at Wittman Field to make it the busiest airport in the world during the week of the show. Many of these planes are kit- or scratch- built, and some of the coolest events of the show are the seminars and workshops on welding, composite layup, metalworking and other pertinent topics.