The International Air Transport Association (IATA) Director Willie Walsh says the air transport industry faces challenges, but is not in a crisis. He tells Bloomberg's Guy Johnson that the economic environment is "still positive." They spoke at the IATA annual meeting in Rio de Janeiro. -------- More on Bloomberg Television and Markets Like this video? Subscribe and turn on notifications so you don't miss any videos from Bloomberg Markets & Finance: https://tinyurl.com/ysu5b8a9 Visit http://www.