Brief panic at London's Heathrow after pepper spray attack: What happened at Europe's busiest airport

Parts of London's Heathrow Airport were briefly locked down on Sunday after a man assaulted a group of people with pepper spray after an argument. FILE PHOTO: Airplanes remain parked on the tarmac at Heathrow International Airport after a fire at a nearby electrical substation wiped out the power at the airport, near London, Britain. REUTERS/Carlos Jasso/File Photo(REUTERS) Police said that the man was arrested, adding that the...