Several U.S. Air Force F-15E Strike Eagles were captured flying through the Mach Loop in north Wales this week, training in an area where pilots are permitted to fly as low as 250-feet while maneuvering through the mountains, training to avoid enemy radar. Like clockwork, the local plane spotters know exactly when to show up, and managed to capture this stunning footage. The Strike Eagles can be distinguished from other U.S. Eagle variants by darker aircraft camouflage and conformal fuel tanks mounted along the engine intake ramps. Click here for the first image in today’s viral picture gallery. Continue reading for the five most popular viral videos today, including one of a lemon-powered supercar.