This week the American people found themselves once again mourning yet another horrific school shooting.
At least 19 children and two teachers were slaughtered after a teenage gunman opened fire at a primary school in Texas.
Salvador Ramos, 18, used two high-powered rifles he reportedly bought on his birthday to kill his small victims.
The brutal massacre happened at Robb Elementary School in Uvalde, Texas, and the onslaught ended after Ramos was shot dead by a border patrol agent.
There have been now more than 3,600 mass shootings in the US since 2014 – while this year alone there have been 27 school shootings.
Below we take a look at some of the youngest and most notorious school shooters who have destroyed families across America.
Columbine High School, 1999
Eric Harris and Dylan Klebold, 18 and 17, were responsible for one of the most notorious school shootings in US history after gunning down 12 students and a teacher in Columbine, Colorado.
The pair also injured 21 others before turning the guns on themselves after the tragedy at Columbine High School on April 20, 1999.
Despite it being 23 years since the teenage outcasts annihilated their classmates, the dead perpetrators still have an army of sick fans who “fantasise about sex with the twisted killers”.
Forensic psychologist Dr Kris Mohandie told Daily Star: “Even Eric Harris and Dylan Klebold were not completely lost causes before they carried out the Columbine attack.
“While she (Klebold’s mum Sue) may not have known his specific violent plans, there were multiple flags she was aware of, including a violent paper he had turned in a few weeks prior to the massacre, and the fact that Dylan had asked her for a gun as a Christmas present.
“She was out of touch, minimised what was going on with her son, partially blaming the school for causing his alienation, as opposed to the absence of parental structures, boundaries and limits. Her one admission of error was that she should have listened more.”
Red Lake Senior High School, 2005
Troubled student Jeff Weise was just 16 when he arrived at Red Lake Senior High School in Minnesota armed with his grandfather’s police-issued firearms.
There, he shot five students, a teacher and a security guard before taking his own life.
Before his school rampage, Weise, believed to have been bullied, fatally shot his grandfather and his grandfather’s girlfriend with a pistol.
He once wrote online: “I’m living every man’s nightmare. This place never changes, it never will.”
His early years were plagued with tragedy – including the suicide of his father when he was eight before his alcoholic mother suffered severe brain damage months later.
Weise also endured being locked in a closet as a child by his mum and her boyfriend.
Marysville-Pilchuck High School, 2014
Jaylen Fryberg was 15 when he shot dead four of his pals in a meticulously planned bloody school massacre.
He opened fire during a lunch break at Marysville-Pilchuck High School, near Seattle, Washington, on October 24, 2014.
The teenager reportedly gathered his friends in the cafeteria before shooting them in the head one-by-one.
Before killing his mates, he texted his warped plan to his family, writing: “I need my crew with me too.”
The horror ended when Fryberg shot himself dead.
Fryberg had just been named Homecoming Prince – but was said to be “heartbroken over a girl” in the days before the murders.
In a note left behind for his parents, he apologised to his victims’ families while also asking to be buried in Camo gear.
Stoneman Douglas High School, 2018
Nikolas Cruz is currently waiting on a death penalty trial after he pleaded guilty to 17 counts of murder and 17 counts of attempted murder.
He was 19 when he shot dead 14 students and three members of staff at Marjory Stoneman Douglas High School, Florida, on February 14, 2018.
It was one of the worst school shootings in American history and authorities are seeking the death penalty.
Cruz used a legally purchased semi automatic weapon to inflict his Valentine’s Day terror.
Disturbing phone footage shows Cruz telling the terrified students: “You’re all going to die.”
Last year he was handed an additional 26-year sentence for attacking a prison guard.
His death penalty trial was recently delayed delayed and the jury will have to decide if Cruz, now 23, will die or spend the rest of his days locked away without the possibility of parole.