Signs featuring blue sky above images of iconic village buildings with the lights on will soon welcome people into town.

ROCHESTER, N.Y. – You know that beautiful, clear blue sky over Rochester? It’s always a welcome sight—when it happens. But have you ever noticed the thin white streaks that sometimes ...

In 1966, the remote Spanish village of Palomares found that the "nuclear age had fallen on them from a clear blue sky". Two years after the terrifying accident, BBC reporter Chris Brasher went to ...