Axios AM: 9/11 at 20 years

Photo illustration of the U.S. flag with a photo of the destroyed World Trade Center behind it

Photo illustration: Sarah Grillo/Axios. Photo: Porter Gifford/Corbis via Getty Images

1. Counterterrorism goes remote

Photo illustration of an American soldier looking through binoculars with images of the destroyed Twin Towers in the background

Photo illustration: Sarah Grillo/Axios. Photos: Wakil Kohsar, Chris Hondros/Getty Images

Photo illustration collage of hands typing on a laptop over an aerial scene of the World Trade Center after the September 11th attacks

Photo Illustration: Annelise Capossela. Photo: Universal History Archive/Universal Images Group via Getty Images

Photo illustration of hands holding a smart phone and pen over a textured background.

Photo illustration: Shoshana Gordon/Axios. Photos:  Andrea Nieto, Susana Gonzalez, Mario Tama/Getty Images

Photo illustration of an Afghan family with masking tape and torn paper.

Photo illustration: Shoshana Gordon/Axios. Photo: Anna Moneymaker/Getty Images

Photo illustration of Rep. Elissa Slotkin, Rep. Mike Gallagher, and Rep. Jason Crow

Photo illustration: Sarah Grillo/Axios. Photos: Bill Clark/CQ Roll Call, Inc via Getty Images

Photo illustration of a collage featuring Rais Bhuiyan, an American flag, and a piece of masking tape over paper textures.

Photo illustration: Brendan Lynch/Axios. Photos: Leigh Vogel and Richard Pruitt/Getty Images

Photo illustration collage of archival photography from 9/11 and contemporary photography of the twin tower memorial lights. 

Photo illustration: Aïda Amer. Photos: Stan Honda/AFP via Getty Images