Martin luther king jr.'s assassin, james earl ray, was captured at the airport in which city?

It was an airport in the city of London, the United Kingdom that King's assassin, James Earl Ray, was captured. In fact, he was captured during June 8, 1968, at the Heathrow Airport as he was going to depart at that time. Martin Luther King Jr. has been one of the advocates of civil rights movement in the United States,