Editor's note: We're seeing reports that there are fatalities after a hot air balloon carrying at least 16 people caught fire and crashed in Caldwell County, Texas, Saturday morning. The Associated Press reports that the NTSB and the FAA are en route to the scene. The balloon crashed in a pasture about 30 miles south of Austin, Texas, around 7:40 a.m. CT. We're looking for updates on the crash. - Andrew
Air travel is a form of travel in vehicles such as helicopters, hot air balloons, blimps, gliders, hang gliding, parachuting, airplanes or anything else that can sustain flight. Use of air travel has greatly increased in recent decades - worldwide it doubled between the mid-1980s and the year 2000.