In early 2020, the rapid spread of Covid-19 changed the lives of people around the world. But at the Pentagon, the virus carried a special warning.
“The pandemic was, in many ways, a wake-up call that we need to focus on military challenges and non-traditional threats,” said Anca Agachi, associate director for the Transatlantic Security Initiative at the Atlantic Council who studies non-traditional threats. “It changed the meaning of security into a more expansive...