美国陆军航空队，相信在白昼轰炸，应以防御性的空中堡垒重轰炸机为组织之骨干。
The U. S. Army Air Forces believed in daylight bombing with the heavily defended Fortress type of bomber as the backbone of the organization .
美国陆军航空队美国陆军航空队美国陆军航空队