Daryn Slover/Sun Journal AUBURN — Clad in royal blue mortarboards and robes, 259 graduating seniors from the Lewiston High School Class of 2021 sat in plastic chairs Sunday morning on the tarmac at the Auburn-Lewiston Municipal Airport for the finale of their high school years. “Although no one wants to dwell on the pandemic, it would be difficult to celebrate our accomplishments without talking about what we have overcome,” Katie Morin, president of the Class of 2021, said in her speech to graduates. “Our class has demonstrated an amazing ability to pivot, adapt and change. In the last year and a half, we navigated a global pandemic, the likes of which no one has ever seen before.”