Remembering the victims of the Sandy Hook Elementary School mass shooting in Newtown, CT, 13 years later

CONNECTICUT (WABC) -- Sunday marks 13 years since one of the deadliest mass school shootings in American history.

On December 14, 2012, a gunman opened fired inside Sandy Hook Elementary School in Newtown, Connecticut. The shooting killed 20 first-grade students and six educators.

"This tragedy thirteen years ago is one of the worst to ever occur in Connecticut, and our hearts will forever be with the twenty innocent children who were taken all too soon and the six devoted educators who lost their lives protecting the students they heroically guarded," Connecticut Gov. Ned Lamont said.

"Let this anniversary serve as a reminder of the courage and strength of our school teachers and faculty, the ongoing need to dedicate ourselves to being sources of love and humanity, and our collective