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 ...

Reuters In Hawaii, the sirens for a missile attack and a natural disaster warning sound different (Pictured ... prepared are we for the impact of nuclear war? North Korea claims its nuclear ...

Testing is performed in cooperation with emergency management officials in Catawba, Gaston, Iredell, Lincoln and Mecklenburg counties in North Carolina, and York County in South Carolina.