I fell in love with electronica and its trance variation a decade ago as I explained HERE. I found a trance track a few years ago on Tiesto's Magic One: First Flight album that combines both my air raid siren interest and my trance interest. The track is entitled "Back On Earth" by Voyager and utilizes near the beginning and ending the sound of an air raid siren. The way it is mixed creates a hauntingly beautiful and yet mournful and melancholy effect which I love.
Update (as of 01/27/15): I posted another track from the same album tonight in "Lock Into The Sun."