Summary: Verizon and AT&T are forging ahead with their plan to switch to new high speed 5G service nationwide -- but with an important exception near U.S. airports and runways. Those exceptions were made Tuesday because of fears that the new technology could interfere with plane technology and potentially impact landings. Science correspondent Miles O'Brien unpacks the details. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders
