The connection of a mountain in north Belfast to the Second World War can still be seen in the presence of a white stone.
A local postman was commissioned by the Department of Defense in 1941 to paint a large stone on the mountain white.
The stone, on Cave Hill, was used at the time to direct Allied pilots to the war airfields in Belfast.
In recent times, a plaque on the mountain to mark the war effort has been defaced.
Campaigners are calling on the public to treat the mountain and the surrounding mountain with respect.
Video journalist: Niall McCracken