Air-raid siren sounds the warning. Air-raid sirens first sounded the warning in London in September 1939. They became an almost daily part of life in the capital a year later during the height of ...

"The siren tone that we heard on Saturday, this week, is what we call the attack mode," said Eric Rasmussen, director of ...

The sound of the 'warning' signal and the 'all clear' would become very familiar to people living in large cities in Britain. Air raid sirens were placed on the top of tall buildings - often ...

"I could tell right away that the sirens didn't sound like the normal tornado siren. It had the up-and-down pitch of an air raid or an attack siren," added Behnke. That's exactly the tone ...