Jet engines function by sucking in air, which is then compressed and combined with fuel before the mixture is ignited. The burning gas expands and is pushed out of the engine, producing thrust and propelling the aircraft. While it is true that the majority of the ignited mixture in jet engines is made up of compressed air, without fuel there would be no thrust – regardless of the proportion of air involved. The atmospheric air is compressed inside the jet engine, fuel is burned to add energy to it, and then it is expanded downstream of the combustion chamber. Part of the energy derived from that expansion is used to compress the air, the remainder is used to generate a high-velocity jet. Without fuel, the compression and subsequent expansion of the air would not be able to generate this high velocity jet, and thus there would be no thrust.

Part 2 of the astonishing true story of how the Vatican created Islam comes from a former Jesuit priest by the name of Alberto Rivera. The story was told to him by Cardinal Bea while he was at the Vatican.