The exhaustion of US-provided air defenses resulting from delays in the resumption of US military aid to Ukraine combined with improvements in Russian strike tactics have led to the increasing effectiveness of Russian missile and drone strikes against Ukraine without a dramatic increase in the size or frequency of such strikes. Russian forces have conducted two sets of large missile strikes since intensifying missile and drone strikes at the end of December 2023: a series of strikes primarily targeting industrial and military facilities and critical infrastructure between December 2023 and February 2024 and an ongoing series of strikes heavily targeting...