If you are new to the NNK or have been a part-timer and recently moved here permanently, you probably should know about loud, house-shaking booms and other loud noises. They come from Dahlgren in King George County, Fort AP Hill in Caroline County, or from the naval station Pax River in St. Mary’s County, MD. Dahlgren Officially Naval Surface Warfare Center, Dahlgren Division , Dahlgren tests munitions at the Potomac River Test Range and at the Explosive Experimental Area at the Pumpkin Neck, across Machodoc Creek to the south of Dahlgren. The installation originally established itself as the major testing area for naval guns and ammunition. Today, it continues to provide the military with the development and integration of warfare systems for the warfighter, warfighting and the future fleet. NSWCDD conducts advance research in all systems-related areas and pursues scientific disciplines including physics, mathematics, directed energy and digital engineering, modeling...