Make it famous: (470 views) 
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![Youtube Thumbnail Air raid siren [10 hours]](http://i.ytimg.com/vi/rIos0ya-yss/default.jpg) Air raid siren [10 hours]
by Kipper 600:39 - 4,171,095 views 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. |
 Civil Protection Radio Chatter - Spark of the Uprising
by Saints Sasha 4:53 - 436,272 views A lot of problems happend to the Combine right before the Uprising. MP3 Download: http://www.4shared.com/mp3/-2u8AtXL/Combine_Nova_Prospect_Radio_Ch.html |
 Intense Warfare Ambience.
by TheZeroGpeep 3:36 - 219,616 views A compilation of sounds to create the atmosphere of an intense battle. The radio sounds and voices are authentic sound clips from Vietnam and Afghanistan. |
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