Aviation is the activities surrounding mechanical flight and the aircraft industry. Aviation began in the 18th century with the development of the hot air balloon, an apparatus capable of atmospheric displacement through buoyancy. Some of the most significant advancements in aviation technology came with the controlled gliding flying of Otto Lilienthal in 1896; then a large step in significance came with the construction of the first powered airplane by the Wright brothers in the early 1900s. Since that time, aviation has been technologically revolutionized by the introduction of the jet which permitted a major form of transport throughout the world.
Taekwondo, Tae Kwon Do or Taekwon-Do is a Korean form of martial arts, characterized by punching and kicking techniques, with emphasis on head-height kicks, jumping spinning kicks, and fast kicking techniques. The literal translation for tae kwon do is "kicking," "punching," and "the art or way of."