FILE - In this May 15, 2015, file photo, United Airlines Chairman, President and Chief Executive Officer Jeff Smisek, speaks during a panel discussion on unfair international competition at the National Press Club in Washington. United Airlines said Tuesday, Sept. 8, 2015, that Smisek has stepped down as CEO, chairman and president effective immediately and has named Oscar Munoz as president and chief executive officer. | AP Photo/Manuel Balce CenetaFILE - In this May 15, 2015, file photo, United Airlines Chairman, President and Chief Executive Officer Jeff Smisek, speaks during a panel discussion on unfair international competition at the National Press Club in Washington. United Airlines said Tuesday, Sept. 8, 2015, that Smisek has stepped down as CEO, chairman and president effective immediately and has named Oscar Munoz as president and chief executive officer. | AP Photo/Manuel Balce Ceneta

United Airlines Chief Executive Steps Down Amid Federal Corruption Investigation

Jeff Smisek exits as federal officials investigate whether airline improperly tried to influence officials at the Port Authority of New York and New Jersey.