Yes, yes, there's an explosion at the end ;) The title used to be 'Nuclear siren [10 hours]' but that was incorrect, hence the picture.
Air raid siren [10 hours]
The Nike Air Raid | by KickGenius
Air Raid Sirens in Korea [GoPro Hero2 and QuikPod]
Building the air raid siren
Israel Air Raid Siren Sounds During Sky Broadcast
WWII Carter Air Raid Siren
Plants vs Zombies DS: Air Raid