Core Viewpoint - U.S. defense firm Northrop Grumman is developing higher caliber cannon bullets aimed at reducing costs for shooting down drones, responding to feedback from Ukrainian soldiers facing drone swarms [1] Group 1 - Northrop Grumman is testing new ammunition types to enhance drone defense capabilities [1] - The initiative is driven by operational insights from Ukrainian forces engaged in combat [1] - The focus is on achieving cost-effective solutions for countering drone threats [1]