Columbine High School massacre

People visit a memorial outside Robb Elementary School in Uvalde, Texas, Monday, May 30, 2022. On May 24, 2022, an 18-year-old entered the school and fatally shot several children and teachers. (AP Photo/Wong Maye-E)

Probe could shed light on police time lapse in Uvalde deaths

Since the Columbine High School massacre more than 20 years ago, police have been trained to quickly confront shooters in the horrific attacks that have followed.

FILE - Marjory Stoneman Douglas High School administrative employees Margarita LaSalle, left, and JoEllen Berman, walk along the hill near the school lined with 17 crosses to honor the students and teachers killed on Valentine's Day, as teachers and staff returned to the school, Feb. 23, 2018, in Parkland, Fla. There have been dozens of shootings and other attacks in U.S. schools and colleges over the years, but until the massacre at Colorado's Columbine High School in 1999, the number of dead tended to be in the single digits. Since then, the number of shootings that included schools and killed 10 or more people has mounted. (Charles Trainor Jr/Miami Herald via AP, File)

From Columbine to Robb, 169 dead in US mass school shootings

FILE - In this March 23, 2019 file photo, former Columbine principal Frank DeAngelis reflects about the upcoming 20th anniversary of the mass shooting at the suburban Denver high school. More than a dozen principals from U.S. schools impacted by shootings have formed a support network for the next colleagues who join their unenviable ranks. The Principals Recovery Network will also advocate for resources to help schools prevent violence. The initial group of 17 includes DeAngelis and a principal from Marjory Stoneman Douglas High School in Parkland, Florida. DeAngelis says it’s a network each participant wishes they’d had. (AP Photo/Thomas Peipert, File)

Principals from schools with shootings form support network

In this Saturday, March 23, 2019 photo, a pin on Rick Townsend's sweater memorializes his daughter, Lauren, who was killed in the April 20, 1999, mass shooting at Columbine High School in suburban Denver. Several survivors and family members of the victims gathered at the school's library to speak to the media Saturday. (AP Photo/Thomas Peipert)

Columbine families gather to tell stories nearly 20 years on

Results of AP-NORC Center poll on attitudes toward guns;

AP-NORC Poll: Majority of Americans favor stricter gun laws

FILE - In this March 15, 2019, file photo, people wait outside a mosque in central Christchurch, New Zealand. The gunman who attacked two mosques in New Zealand, killing at least 49 people, was said to have been inspired by the man who in 2015 killed nine black worshippers at a church in Charleston, South Carolina. (AP Photo/Mark Baker, File)

Should media avoid naming the gunmen in mass shootings?

A few months after teen shooters killed 12 classmates and her father at Columbine High School, Coni Sanders was standing in line at a grocery store with her young daughter when they came face to face with the magazine cover.

Students, relatives and neighborhood residents, pray outside the Raul Brasil State School one day after a mass shooting, in Suzano, Brazil, Thursday, March 14, 2019. Classmates, friends and families began saying goodbye on Thursday, with thousands attending a wake in the Sao Paulo suburb while authorities worked to understand what drove two former students to attack the school with a gun, crossbows and small axes. (AP Photo/Andre Penner)

Brazil police: school attackers imitating Columbine massacre

SUZANO, Brazil (AP) — Two young men who stormed their former school in southern Brazil armed with a gun, crossbows and axes, killing seven people, were trying to emulate the 1999 Columbine attack in Colorado and had been planning the assault for months, police said Thursday.

California artist David Best talks during an interview with the Associated Press, about how he is building a non-denominational, temporary temple for the anniversary of the Marjory Stoneman Douglas High School shooting massacre, on Tuesday, Feb. 5, 2019 in Coral Springs, Fla. This creation he is calling "The Temple of Time" to commemorate the indefinite period it will take for the community to come to grip with the slayings. He rejected "The Temple of Healing" because that is impossible for the victims and their families. (AP Photo/Brynn Anderson)

Parkland massacre survivors privately mourning anniversary

PARKLAND, Fla. (AP) — The communities and families terrorized by the Marjory Stoneman Douglas High School massacre will spend Thursday’s anniversary visiting graves, packing meals for the needy and contributing to other service projects as they quietly remember the 14 students and three staff member

FILE - In this Jan. 28, 2013, file photo, members of the Washington County Sheriff's Office and the Hudson Falls Police Department use unloaded guns to take part in an emergency drill as they walk through a corridor inside the Hudson Falls Primary School in Hudson Falls, N.Y. With each subsequent shooting forcing schools to review their readiness, parents are increasingly questioning elements of the ever-evolving drills that are now part of most emergency plans, including the use of simulated gunfire and blood, when to reveal it’s just practice, and whether drills unduly traumatize kids. (Omar Ricardo Aquije/The Post-Star via AP, File)

Parents question whether shooting drills traumatize kids

BUFFALO, N.Y. (AP) — Long before an ex-student opened fire on his former classmates in Parkland, Florida, many school districts conducted regular shooting drills — exercises that sometimes included simulated gunfire and blood and often happened with no warning that the attack wasn’t real.

Community members wait on details at the Santa Fe ISD Alamo Gym where students and faculty are being brought after a shooting at Santa Fe High School on Friday, May 18, 2018, in Santa Fe, Texas. (Jennifer Reynolds /The Galveston County Daily News via AP)

Texas shooting renews debate about American school design

Just hours after the nation’s latest school shooting, the debate began anew: Are American schools built in a way that makes them easy targets?

Columbine, Parkland students unite for voter registration

DENVER (AP) — A planned national high school walkout for gun control on the 19th anniversary of the Columbine shooting Friday won’t include student protests at the Colorado school that changed the way the nation viewed shootings.