LITTLETON, Colo. (KKTV) - It's been 18 years since the deadliest high school shooting massacre in U.S. history happened on Colorado soil.
On April 20, 1999, high school seniors Eric Harris and Dylan Klebold opened fire on their peers, ultimately killing 12 students and one teacher before committing suicide. Nearly two dozen more were injured.
Each year since the shooting, crosses are placed in Clement Park near the school, representing the students and faculty who lost their lives that day. The memorial opened in 2007.
People associated with the school told sister station KCNC last year that it is their intention that the tragedy never be forgotten.
"As long as I physically can do it I will be here because I think it’s really important," Rhonda Grindle said.
"A lot of people are spending this day doing different things, and I feel like I always want to take a second to remember what happened, because that's what I associate with this day," Katy McAllister said.
For a daughter who lost her father in the shooting, reflection has become a sad routine every spring.
"Hate overwhelmed two boys enough to take people from our lives and now this is what we do around Easter," Coni Sanders told KCNC at the 15th anniversary. "We are part of an unwanted family. None of us asked to be part of this family, family of survivors of mass tragedy."
Dave Sanders, a teacher and girls basketball coach, was killed trying to get students out of danger. He had guided hundreds out of the cafeteria and was met by one of the gunmen when trying to help students hiding on the second floor of the school.
"He was in the right place at the right time because had he not been there, hundreds of students could have been killed," Sanders said.
The mother of one of the attackers, Sue Klebold, told Diane Sawyer in an interview last year that she never stops thinking of the the victims.
"There is never a day that goes by where I don't think of the people that Dylan harmed. It is very hard to live with the fact that someone you loved and raised has brutally killed people in such a horrible way."
The victims who lost their lives on April 20, 1999: