(CNN) - After Tuesday's shooting at an Oregon high school, many media outlets, including CNN, reported that there have been 74 school shootings in the past 18 months.
That's the time period since the December 2012 massacre at Sandy Hook Elementary School in Newtown, Connecticut, where 20 children and six adults were shot to death.
Without a doubt, that number is startling.
So on Wednesday, CNN took a closer look at the list, delving into the circumstances of each incident Everytown included.
Everytown says on its web site that it gleans its information from media reports and that its list includes school shootings involving a firearm discharged inside or on school grounds, including assaults, homicides, suicides and accidental shootings.
CNN determined that 15 of the incidents Everytown included were situations similar to the violence in Oregon - a minor or adult actively shooting inside or near a school. That works out to about one shooting every five weeks.
It is a sickening image that has become all too familiar to Americans around the country.
Students walking single file, arms raised, after a gunman opens fire inside their school.
This time, it happened at a high school just outside Portland, Oregon.
One student was shot and killed, and a teacher was injured. Multiple law enforcement officials tell CNN the gunman is dead from a self-inflicted wound.
Reynolds High School student Hannah League shares what she experienced during the shooting.
Pamela Brown has the latest details.
Detroit's police chief James Craig says he thinks more people with concealed weapons would deter violence, even though his city has one of the highest violent crime rates per capita in the country.
So why does he think more guns would help?
OutFront: Detroit Police Chief James Craig.
A surprising statement on gun violence from the police chief of one of America's most violent cities.
Detroit's top cop James Craig says he thinks more people need guns to keep safe.
"There’s a number of [concealed pistol license, or CPL] holders running around the city of Detroit. I think it's acting as a deterrent. Good Americans with CPLs translates into crime reduction, too," Craig said on WJR Radio's "The Paul W. Smith Show."
So would Detroit and other violence-plagued cities really benefit from more guns?
OutFront: Mike Brooks is an HLN Law Enforcement Analyst and John Lott is the Author of "More Guns, Less Crime."
Has the White House done enough to deliver on its promise to fight for measures to prevent future Sandy Hooks?
Nearly one year since the devastating Newtown massacre, Vice President Joe Biden met with families who lost loved ones in the Sandy Hook Elementary school shooting.
He pledged $100 million in funding for a mental health initiative as one way to stem gun violence.
It's part of litany of promises the president has made over the past year.
President Barack Obama: "In the coming weeks, I will use whatever power this office holds to engage my fellow citizens – from law enforcement to mental health professionals to parents and educators – in an effort aimed at preventing more tragedies like this." (December 16, 2012)
Vice President Joe Biden: "The recommendations we provided to the president on Monday call for executive actions he could sign, legislation he could call for, and long-term research that should be undertaken." (January 16, 2013)
President Barack Obama: "We need everybody to remember how we felt 100 days ago and make sure that what we said at that time wasn't just a bunch of platitudes, that we meant it." (March 28, 2013)
But has the Obama administration really done enough to fulfill all these promises?
OutFront: Paul Helmke, the former president of the Brady campaign to prevent gun violence and Michael Skolnik is the editor-in-chief of Global Grind.com