How Ukraine’s new tech foils Russian aerial attacks

War, however, can spur innovation. Four days after the invasion began, a group of ambitious Ukrainian techies formed an outfit called Technari to develop an alternative system, known as ePPO, for detecting and tracking Russian aerial attacks. Gennady Suldin, a co-founder, describes it as “human radar”. Consisting of a smartphone app and an artificial-intelligence (AI) model, it allows verified Ukrainian citizens to report flying objects they see or hear with the push of a button.