The passionate debate over gun control spilled over into United Continental's annual shareholder meeting in Chicago today. : (Bloomberg) — The passionate debate over gun control spilled over into United Continental Holdings Inc.'s annual meeting, when an attendee grilled Chief Executive Officer Oscar Munoz about why the carrier severed its ties with the National Rifle Association. Taking such a stand in the aftermath of the mass shooting in Parkland, Florida, risked alienating millions of potential customers who have firearms or support the right to own them, the person said during the Wednesday session.