That's a lot of airplanes in the air. I wonder if this statistic is only commercial airlines or if it includes private planes too. If it's only commercial airlines, then that's a lot of people flying. If it includes private aircraft, then it doesn't seem like so much.
That's a lot of airplanes in the air. I wonder if this statistic is only commercial airlines or if it includes private planes too. If it's only commercial airlines, then that's a lot of people flying. If it includes private aircraft, then it doesn't seem like so much.