At the time of its development, long-range fighter aircraft such as the North American P-51 Mustang were just entering quantity production, and thus were not yet available to accompany bombers all the way from England to Germany and back.
Pada saat pembangunan, pesawat tempur jarak jauhnya seperti Amerika Utara P-51 Mustang yang baru saja memasuki kuantitas produksi, sehingga belum tersedia untuk menemani pembom sepanjang jalan dari Inggris ke Jerman dan kembali.