A United Airlines flight had to divert to Belfast International Airport in Northern Ireland, on the evening of June 20.
The plane was on its way from Rome, Italy to Chicago when a 42-year-old passenger Jeremiah Mathis Thede asked for nuts or crackers. Authorities said he was given some nuts but he kept-on demanding for more and showed an erratic behavior. The pilot became concerned due to situation and decided to make an emergency landing.
The plane landed safely and all 282 passengers were flown to Chicago next day.

Aeromexico flight AM-8 made an emergency landing at Heathrow Airport, England, on February 9th.
Air Canada flight AC-885 had to return and make an emergency landing at Charles de Gaulle Airport, France, on June 22nd.