That Saturday afternoon in Ahwatukee was pushing a temperature of about 96 degrees as Cook and Quian's group of friends met outside at a nearby lake for group and couple photos.
Cook and Quian walked down a long, winding sidewalk along the residential lake near 33rd Street and Chandler Blvd. Joining their friends, other parents and family members, the group mingled around the lake and fountain for their turn to get photos taken.
Wearing the same dress as friend and senior Lori Fusak, who would later be named Prom Queen, the girls laughed and chatted about their plans for after the dance—an all-girls sleepover.
After the group was properly placed for their group photo, taken by friend Paul Berg's father, Cook gave her mom a hug just before heading out to dinner.
"I love you," said Diedrich as she looked at her daughter and hugged her. "Have fun."