On September 16, 1979, eight people from two families escaped from East Germany to West Germany in a homemade hot air balloon. The escape was the result of over a year and a half of preparations, involving three different balloons and various modifications. The families, led by Peter Strelzyk and Günter Wetzel, successfully crossed the border after a failed attempt two months earlier. The escape led to increased border security and restrictions on the purchase of materials that could be used for similar attempts.