Passengers who want to travel should not have to show proof that they received a COVID-19 vaccine, aviation leaders told lawmakers at the Senate Subcommittee on Aviation Safety, Operations and Innovation hearing on April 21. Leaders from the aviation industry hope to open up air travel and believe that vaccine passports may help restore consumer confidence in flying again, but requiring such proof should be voluntary and temporary. “A vaccinating passport, if not mandatory, could be a tool that could be helpful to regain confidence in air travel, but it must be temporary,” said Sara Nelson, international president of the Association of Flight Attendants-CWA. “It must be focused on COVID-19, it must be voluntary, and we just need to make sure that this is not a mandatory program that keeps certain people from being able to access air travel,” she added. Nick Calio, President and CEO of Airlines for America …