altimeter, a critical piece of instrumentation that pilots use to get a hypersensitive reading of their exact height above the ground. now, without that and with these possible errors, airlines say this could lead to thousands of flight delays and cancellations and diversions. now, we know that at&t and now verizon have said they will delay the rollout of 5g because of these airline industry concerns near certain airports. we don't know exactly what airports. we don't know for exactly how long. at&t, in its statement, threw a lot of shade at the faa and the airline industry here saying, quote, we are frustrated by the faa's inability to do what 40 other countries have done, which is to safely deploy 5g technology without disrupting aviation services, and we urge it to do so in a timely manner. now, airlines said this was a really huge issue for them. i've been covering this for weeks, and in this letter from the airline executives, of ten different airlines, mind you, to