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A United States Air Force (USAF) F-15 fighter jet travels at low altitude through the “Mach Loop” series of valleys near Dolgellau, north Wales on June 26, 2018. The Mach Loop valleys, situated between Dolgellau and Machynlleth, are regularly used by the military for operational low flying training which can take place as low as 76 metres from the nearest terrain. The USAF regularly use the loop to practice low-altitude flight, which confuses radar systems. The $93 million craft features a navigation pod containing a terrain-following radar which allows the jets to fly safely at very low altitudes. Its cutting-edge laser targeting system allows an enemy to be selected for destruction from a distance of 10 miles. It carries the most air-to-ground weapons of any US air force craft including Sidewinder missiles, advanced Air-to-Air Missiles and 20mm cannon with 500 rounds – used against enemy aircraft and “soft” ground targets. (Photo by Oli Scarff/AFP Photo)
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