Parkland

FILE - In this May 1, 1999, file photo, demonstrators gather on the Colorado State Capitol grounds in Denver, Colo., to protest against the National Rifle Association's annual meeting, which is being held in the city. Data shows that such shootings are less frequent and with fewer killed than in the years that preceded Columbine. Still, Americans worry about how safe schools are. (AP Photo/Eric Gay, File)

Staff of the South Florida Sun Sentinel celebrate their bittersweet honor Monday, April 15, 2019, in Deerfield Beach, Fla., after winning the Pulitzer Prize for Public Service. The newspaper won for its coverage of the Parkland school shooting. (Carline Jean/South Florida Sun-Sentinel via AP)

Lisa and Richard Olson, who's son was injured during last year's Parkland school shooting, look on during a news conference, Wednesday, April 10, 2019, in Fort Lauderdale, Fla. Survivors and family members of the slain victims of the school shooting in Parkland, Florida, sued the school board, sheriff's office and others for negligence Wednesday, saying the agencies initially had promised a financial settlement but secretly worked behind the scenes to prevent a deal. (AP Photo/Wilfredo Lee)

FILE - In this Nov. 15, 2018 file photo, Broward County Public Schools Superintendent Robert Runcie appears before the Marjory Stoneman Douglas High School Public Safety Commission in Sunrise, Fla. The mother of a Marjory Stoneman Douglas High School shooting victim who is now on the county school board is pushing to have the Runcie fired, saying he “has a history of leadership failures.” Lori Alhadeff placed a measure on the Broward County school board agenda for Tuesday, March 5, 2019, calling for Runcie to be fired. Alhadeff’s 14-year-old daughter Alyssa died in the Feb. 14, 2018, massacre. Alhadeff has the support of other families of the 14 students and three staff members killed. (AP Photo/Brynn Anderson, File)

Photo by Alex Wong/Getty Images

A school bus evacuates students from Sue V. Cleveland High School in Rio Rancho, New Mexico, on Thursday, Feb. 14, 2019, after a shot was fired on the campus. Police and school officials said no one was injured and a suspect was taken into custody. (AP/Russell Contreras)

Students at Seminole Middle School in Plantation, Fla., participate in a moment of silence Thursday, Feb. 14, 2019, for the 14 students and three staff members killed one year ago at nearby Marjory Stoneman Douglas High School. They are sitting in front of a new mural depicting musicians from throughout the world that was dedicated to the shooting victims. (AP Photo/Terry Spencer)

Boardman High School students clap as Officer Daryn Tallman and his K-9, Sumo, walk the halls after a lockdown drill, Thursday, Feb. 14, 2019, in Boardman, Ohio. Some students around the country marked the anniversary of the school massacre in Parkland, Florida, with moments of silence Thursday or somber vigils while others sought to find threads of positivity in the fabric of tragedy. (AP Photo/Tony Dejak)

In this Jan. 30, 2019, photo, Sgt. Michael Hazellief, training supervisor, walks on the grounds where the "guardians" are participating in a training session to respond to active shooters in Okeechobee, Fla. Okeechobee is one of the Florida districts that have started training and arming non-instructional personnel in the aftermath of the Marjory Stoneman Douglas High School shooting. Authorities keep the identities of these guardians secret, citing security reasons. (AP Photo/Brynn Anderson)