President Vladimir Putin's swift and severe response to an attack on his Black Sea fleet reflects a war that is increasingly marked by a duel between long range Russian missiles and Ukraine's innovative array of drones and truck bombs.
Putin on Monday made clear why he was suspending Russia's involvement in a deal that for three months had allowed much-needed Ukrainian grain to be shipped to global markets: He wants to secure the Russian Navy's ships after an attack by air and sea drones.
