The AC-130 is the world's biggest flying artillery gunship - nicknamed 'Hell in the Sky.' With three side-firing weapons, a 25mm Gatling gun, a 40mm Bofors cannon, and a 105mm howitzer ...

As noted by the Dark Skies MSN channel in the text caption to their video titled “Flying Artillery: The Untold Story of the Bell Airacuda”: “Designed as a flying anti-aircraft battery ...