Agree with this assessment. My guess is that the reasons that the U-2s are still around is that a) they still do a great job, and b) even though they are quite old they are probably packed with the best jamming equipment around, which makes them difficult to track. Another guess is that by this time they've developed some sort of pod or internal jammer that can target specific items and for whatever reason it was on and you saw the effects. It does, however, lead you to believe that if they wanted to they could easily take down a country's power grid, communications, etc.
When I was in the air force an F16 pilot forgot to turn off his electronic jamming equipment when he returned to base. It burned out quite a bit of the radar and air traffic control equipment.
Or maybe one of the bandaids/bubble gum fixes fell off the LAX equipment.
Any chance jammers were turned on full because Russian planes were close at hand?