CARL RUSSO/staff photo Andover graduates, from left, Kalli Archambault, Grace Angelo and Juliann Alpert celebrate before the ceremony starts. Andover graduates, their families, friends and teachers took refuge from the hot sun under the large tent for the high school's 161st. Commencement ceremony Monday afternoon. In the last four years the 445 members of the Class of 2021 have witnessed the Merrimack Valley gas explosions, learned during a once-in-a-century global pandemic, and, for their last lesson, the Golden Warriors overcame 92 degree heat. “The past four years have been anything other than normal, yet as a class we have faced it with resilience,” said Caroline Chen, who read the class essay. “COVID put a pause on traditions, but certainly didn’t stop us." 6/7/2021