signals could slow down hundreds of thousands of flights. a new analysis from industry group airlines for america, say 345,000 flights could be delayed or diverted each year, affecting 32 million passengers. very actively. reporter: 5g interference impacts radar altemeters used to tell the actual height and low visibility. eduardo rojas leads the radio spectrum lab at emery riddle aeronautical lab in florida. it is difficult trent from helicopters, especially because it helps tune in. it s a concern, a big concern. reporter: airline executives say it is now on the federal government to ban 5g transmitters from nearby airports or delay its rollout so your next flight isn t. this is not an issue created by airlines or airline customers, and it cannot be solved on the backs of airlines