It's been 86 years since disgruntled school board member Andrew Kehoe set off bombs killing 45 people, including himself, while injuring more than 50 others at Bath High School in Bath Township, Mich.
Irene Dunham was supposed to be at school on that day.
"I had a sore throat and didn't go to school that day," Dunham said. "But we heard the bomb go off."
Dunham said she still remembers what she saw that day when her and mother drove up to the school.
"Moms were there looking for their kids because it was blown up, it was terrible," she said.
But in the wake of what still remains the deadliest act of terrorism in U.S. history behind 9/11 and the Oklahoma City bombings, alumni of Bath High School gathered Saturday not just to remember, but also to celebrate the school's rich history.
"It's so important that the next generation understands the importance of keeping history going and keeping it out front," said Michelle Bellmore, an alum of Bath and also a member of the school's museum committee.
This year the class of 1963 was recognized, marking 50 years since their graduation.
"It's an honor to have the alumni come together to be able to share all of the history," Bellmore said. "Everyone can share their stories of what they remember and who they remember."
Bellmore said they're able to have such successful reunions because of how close-knit the community is.
"We are a smaller town and the community is really pulled in together around the school," she said.
"So many of my friends say 'I may live in another state but Bath is my home.'"
And it's that feeling of home that draws so many, like Irene Dunham, back to the school to keep history alive. At 105 years old, Dunham is also the oldest surviving Bath alum.
"It means a lot to me to come back and see all the people," she said. "I love being able to talk with them."