et pourtant
The defensive avionics system also did not initially perform as well as expected. It's reliability was somewhat less that what was desired, and in some situations, it was found possible for the aircraft actually to jam itself. The system could not detect, locate, or identify some of the newer Soviet air defense radars that had been introduced in the 1980s, and had trouble with some of the newer Soviet interceptors and missiles. Continual upgrades were added throughout the 1980s, but during the upgrade process it often proved true during this period that no two B-1Bs ever had precisely the same equipment aboard.
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