 This directive arose from the Combined Chiefs of Staff Conference in Washington, DC, in May.As Harris later wrote, "The 8th United States Army Air Force was to attack the principal airframe and other aircraft factories while my Command was to attack the industrial towns in which there was the largest number of aircraft component factories; most of these towns, as it happened, were further east or south than the Ruhr".As a radar factory, the Zeppelin shed at Friedrichshafen was a valid and important Pointblank target, but an added attraction, in Harris's view, was its great distance from England, "a further reason for carrying out this rather elaborate operation was that it would help to spread the enemy’s defences; Friedrichshafen had every reason to consider itself safe from attack, especially in the summer months, and this unexpectedly deep penetration might well cause other places outside the more vulnerable areas to scream for defences".