Russian forces may shift their focus in the coming weeks to targeting Ukraine’s transportation infrastructure, the Institute for the Study of War (ISW) wrote in its April 23 report. Moscow intensified missile and drone attacks against Ukraine’s energy grid in spring 2024, exploiting delays in Western aid that led to critical ammunition and air defense shortages. The assault failed to collapse Ukraine’s power grid, but destroyed critical facilities in multiple cities. The long-awaited passage of a security assistance package worth $61 billion in the U.S. Congress means that Ukraine’s defense ca…