“Sometimes the F-35 just provides a whole bunch of pressure into the mask for unknown reasons, I don’t know why but it does, it makes exhalation difficult”.It shouldn’t be, in my opinion, but it is." Breathing in this jet is different than sitting here talking to you and breathing. The Israelis aren't adding ECM onto the F-35 for fun. I have always found ground realities discovered by air forces to be much more reliable than rosy brochures, the same story played between the Rafale and F-35 until the Swiss proved the Rafale crowd wrong. They have obviously deemed American EA capability to be inferior or insufficient compared to their own. On further research, I have discovered that the F-35 Adir will be getting a slightly modified wing and airframe that will allow the integration of Israeli ECM internally within the aircraft, apart from carrying an external pod. The only way an F-15 will support an F-35 is if they have decided the F-35 needs external assitance, which would imply the basic design parameter of the F-35 has failed. Even if RCS is reduced to 1m2, it will still not make any tactical difference. Its massive 15m2 RCS will make it easily detectable from hundreds of Kms away. It's impossible for an F-15EX to be beyond any sort of threat range.