The Schweinfurt–Regensburg mission caused an immediate 34% loss of production and all plants but the largest were devastated by fire. Efforts to disperse the surviving machinery began immediately and the Luftwaffe deployed large numbers of interceptors along the corridor to Schweinfurt. Bombing also included the Second Raid on Schweinfurt on 14 October 1943 ("called Black Thursday because of the enormous loss of aircraft (60) and lives (600+)") and Big Week in February 1944.