An F-15 fighter jet has been filmed swooping through the Mach Loop valleys in North Wales. <br /><br />The video shows the F-15E Strike Eagle carrying out various twisting manoeuvres against the pretty backdrop of the valleys.<br /><br />The valleys, near the towns of Dolgellau and Machynlleth, are regularly used for low-level flight training. At times aircraft fly as low as 250 feet (76 metres) from the nearest terrain.<br /><br />The clip, filmed on September 7, shows the plane flying through the valleys leaving two smoke trails in its wake.<br /><br />The UK hosts the US F-15 fighter jets at RAF Lakenheath in Suffolk.<br /><br />“It’s totally different from airshows where you know when they are coming," explains the filmer. "Here your excitement builds up when the radios announce low-level flying. You've got seconds to get ready with your equipment.
