Unit X: How the Pentagon and Silicon Valley Are Transforming the Future of War, Raj M. Shah and Christopher Kirchhoff, Scribner, 336 pp., $30, July 2024.
European Council President Donald Tusk, U.S. President Donald Trump, French President Emmanuel Macron, and British Prime Minister Boris Johnson attend a working session in Biarritz, France, on Aug. 25, 2019, the second day of the annual G-7 Summit.
Local workers unload a Douglas Dakota Transport airplane at the U.S. Army Air Force Base in Karachi in July 1943. (Ivan Dmitri/Michael Ochs Archives/Getty Images)
