Like graduating seniors everywhere, members of Newtown High School’s class of 2024 expect bittersweet feelings at their commencement ceremony — excitement about heading off to college or careers and sadness about leaving their friends and community.

But about 60 of the 330 kids graduating Wednesday will also be carrying the emotional burden that comes from having survived one of the deadliest school shootings in U.S. history and knowing many former classmates won’t get to walk across the stage with them. Twenty of their fellow first graders and six educators were killed at Sandy Hook Elementary School on Dec. 14, 2012.

The victims will be honored during the ceremony, but details have been kept under wraps.

Soon, these Sandy Hook survivors will be leaving the community that many call a “bubble” because of the comfort and protection it’s provided from the outside world.