File:Khyber Pass photograph by Ewing Galloway.jpg

English: Caption text says "Khyber Pass, the gateway extending thirty miles from northwest India [now known as Pakistan] into the Plain of Jelalabad, in Afghanistan. The way proceeds through lofty cliffs that are almost vertical, narrowing in spots to twenty feet. It is fortified by the British and considered well-nigh impregnable, but an attack from the air might clear the path for an invading enemy. The Moslem [sic] world is almost evenly divided under British and Bolshevik rule. Now England is watchful lest the Reds of Russia attempt to crowd through this narrow passage to join forces with the Moslems of India, who are openly rebelling against England. Below is seen a busy motor road through the pass. Far above, the camel path winds through the cliffs."