Ukraine is proving it can hit almost any target inside Russia, as attacks on oil refineries, weapons factories, and military convoys become increasingly common. The strikes have caused fuel shortages in Russia, with one attack on Moscow generating explosions and "black rain" that sent residents scrambling for cover. Ukrainian President Volodymyr Zelensky has claimed Russia moved most of its air defenses to protect key areas like central Moscow and a presidential residence, leaving other targets vulnerable. Russian President Vladimir Putin acknowledged "problems" and "certain shortages" from the strikes but downplayed their significance.