He was the loyal companion of the Dambusters hero whose extraordinary bravery captured the nation. Now ghost hunters believe the spectre of Nigger the dog, the Dambusters mascot, is still faithfully guarding his master's old quarters. Ghost enthusiasts are convinced that the ghosts of both Wing Commander Guy Gibson and his chocolate–coloured Labrador still haunt the remote Lincolnshire airfield from which the audacious raid was launched.