Aviation is a term that includes all the activities involved in building and flying aircraft, especially airplanes. The first successful airplane flights did not take place until 1903. Yet today, airplanes affect the lives of people almost everywhere. Giant airliners carry passengers and cargo between the world's major cities in a matter of hours. Planes and helicopters rush medicine and other supplies to the farthest islands and deepest jungles. Farmers use airplanes to seed fields, count livestock, and spray crops. Aviation has also changed the way nations make war. Modern warfare depends on the instant striking power of jet fighters and bombers and the rapid supply capabilities of jet transports. Helicopters and other special aircraft are also important in military aviation.
Hundreds of thousands of airplanes are used throughout the world. They range from small planes with room for only a pilot to enormous jumbo jets, which can carry hundreds of passengers. To produce and operate all these airplanes requires the skills of millions of workers in many countries
