Six minutes and 20 seconds: it took only about the length of a TV news mini-segment for 19-year-old to murder 17 people with a semiautomatic rifle at Marjory Stoneman Douglas High School in Parkland, Florida last month.

Today, Douglas senior and activist Emma Gonzalez addressed a crowd of hundreds of thousands of people she’d helped to gather with her classmates in Washington, D.C. in just weeks (estimates currently have the crowd size at 800,000). Gonzalez named the victims: Alyssa Alhadeff, Martin Duque Anguiano, Nicholas Dworet, Jamie Guttenberg, Luke Hoyer, Cara Loughran, Gina Montalto, Joaquin Oliver, Alaina Petty, Meadow Pollack, Helena Ramsay, Alex Schachter, Carmen Schentrup, and Peter Wang; teacher Scott Beigel; and coaches Aaron Feis and Chris Hixon.

Then she stood in silence for the remainder of her six minutes and 20 seconds onstage.

It’s been only about five weeks, but it feels like an eternity. As of Friday, the Gun Violence Archive has recorded 73 teens shot to death since Parkland, HuffPost reports.