It didn't. There's actually a generous guard band between the radar altimeter frequencies and 5G. I say generous because it's more than double what the manufact

It didn't. There's actually a generous guard band between the radar altimeter frequencies and 5G. I say generous because it's more than double what the manufacturers asked for. And what other countries are already providing without issue. https://arstechnica.com/tech-policy/2021/11/faa-forced-delay-in-5g-rollout-despite-having-no-proof-of-harm-to-aviation/ https://arstechnica.com/tech-policy/2021/11/faa-forced-delay... And yeah this has been years in planning (2017) with public consultation.