Geo Group, a private prison firm that makes digital tools to track immigrants, becomes one of the Trump administration’s big business winners as its tech is increasingly used in deportations.

© Photo Illustration by Javier Palma; Photographs by Doug Mills/The New York Times; Quinn Glabicki/Reuters; Frederic J. Brown/AFP; Alamy

Eric Slesinger made a career shift from the spy agency to venture capital, championing military start-ups as Europe beefed up its defenses amid an uncertain relationship with the United States.

© Christopher Gregory-Rivera for The New York Times