Boeing Chief Executive Officer Dennis Muilenburg speaks at the Boeing Annual General Meeting in Chicago, Illinois, U.S. April 29, 2019.

Boeing Co Vice-President and Corporate Secretary Grant Dixton (L), introduces Boeing Co Chief Executive Dennis Muilenburg at the annual shareholder meeting in Chicago, Illinois, U.S., April 29, 2019. Joshua Lott/Pool via REUTERS

The Boeing board of directors, including Nikki Haley (right) and Caroline Kennedy (3rd from right), is announced by Chief Executive Officer Dennis Muilenburg during at the Boeing Annual General Meeting in Chicago, Illinois, U.S. April 29, 2019.

Demonstrators protest outside the Boeing Annual General Meeting in Chicago, Illinois, U.S. April 29, 2019.

Demonstrators, including Russekk Nokhiber (R), protest outside the Boeing Annual General Meeting in Chicago, Illinois, U.S. April 29, 2019.

Boeing Co Chief Executive Dennis Muilenburg speaks during a news conference at the annual shareholder meeting in Chicago, Illinois, U.S., April 29, 2019. Joshua Lott/Pool via REUTERS

Boeing Chief Executive Officer Dennis Muilenburg speaks at a press conference after the Boeing Annual General Meeting in Chicago, Illinois, U.S., April 29, 2019.

Boeing Co Chief Executive Dennis Muilenburg arrives to a news conference after speaking at Boeing's annual shareholder meeting in Chicago, Illinois, U.S., April 29, 2019. Joshua Lott/Pool via REUTERS