January 02, 2018 Updated January 02, 2018 20180102_atc_what_accounts_for_commercial_airlines_safest_year_in_history.mp3 Listen • 3:55 20180102_atc_what_accounts_for_commercial_airlines_safest_year_in_history.mp3 Copyright 2018 NPR. To see more, visit http://www.npr.org/.