The CEOs of the two largest commercial jet manufacturers in the United States warned against the deployment of expanded 5G mobile broadband technology in a letter to Secretary of Transportation Pete Buttigieg. Dave Calhoun of Boeing and Jeffrey Knittel of Airbus Americas expressed concern on Dec. 20 about a plan by Verizon and AT&T to roll out the new technology on Jan. 5, 2022, and urged the Biden administration to intervene to postpone the adoption of the new network. “5G interference could adversely affect the ability of aircraft to safely operate,” the letter reads. The letter echoed concerns from a report published last year that concluded 5G constitutes a serious concern for the integrity of aircraft systems. Because 5G signals often broadcast at frequencies similar to those used by flight systems such as radio altimeters, industry leaders and regulators are concerned that expanding 5G networks will result in flight delays or …