A man who caused Dublin airport to be evacuated, because he wanted to "make a point", has been jailed for three years.

John McHugh caused almost 150 flights to be cancelled or delayed on July 4, 2006, when he placed a backpack over his head saying he had a bomb.

McHugh was disappointed people did not respond to a T-shirt he wore, which said: "I salute the Iraqis' right to bear arms", days earlier in the city.