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Photo: Zach Pagano/NBC/NBCU Photo Bank via Getty Images

Former Marjory Stoneman Douglas High School resource officer Scot Peterson has been arrested on 11 charges related to his lack of response to the mass shooting in 2018.

Why it matters: Peterson was on duty the day that the Parkland massacre resulted in 17 dead, but did not confront the shooter — remaining outside during the event. Now, he faces charges including child neglect, perjury and culpable negligence. The charges amount to nearly 100 years of prison time, and Peterson's bail has been set at $102,000.

A Florida Department of Law Enforcement investigation showed that Peterson did "absolutely nothing to mitigate the MSD shooting." Peterson did not investigate the source of the shooting, physically distanced himself from the event and told other officers arriving to remain 500 feet away from the building.

"There can be no excuse for his complete inaction and no question that his inaction cost lives."
— FDLE Commissioner Rick Swearingen

What to watch: In response to the school-safety incident, Florida has introduced a "guardian" program to allow for trained school staff and teachers to be armed.

Go deeper: Why school resource officers won't solve school safety

Go deeper

Most teachers are white. Most students aren't.

Expand chart
Data: U.S. Department of Education, National Center for Education Statistics; Chart: Baidi Wang/Axios

The nation's 6.6 million teacher workforce has grown more racially and ethnically diverse over the past three decades — but not nearly fast enough to keep pace with a student population that's nearing majority-minority in public schools, two new reports show.

Why it matters: The disparities are especially acute between Hispanic students and teachers, and in schools with 90% or higher non-white student populations.

Updated 12 hours ago - World

UK government: Kremlin has plan "to install pro-Russian leadership" in Ukraine

British Foreign Secretary Elizabeth Truss. Photo: Gints Ivuskans / AFP via Getty Images

The United Kingdom's Foreign Secretary on Saturday night said the government has "information that indicates the Russian Government is looking to install a pro-Russian leader in Kyiv as it considers whether to invade and occupy Ukraine."

Driving the news: U.S. National Security Council spokeswoman Emily Horne called the intelligence "deeply concerning" in a statement to Axios. The Biden administration has said Russia is actively manufacturing a pretext for invasion and warned that Putin could use joint military exercises in Belarus as cover to invade from the north.

Updated 13 hours ago - Science

This powerful new accelerator looks for keys to the center of atoms

Illustration: Eniola Odetunde/Axios

Nuclear physicists trying to piece together how atoms are built are about to get a powerful new tool.

Why it matters: When the Facility for Rare Isotope Beams begins experiments later this spring, physicists from around the world will use the particle accelerator to better understand the inner workings of atoms that make up all the matter that can be seen in the universe.