"What is clear and what we absolutely can say, is that the damage to the Ukrainian people and to the region will be significant," National Security Council spokesman John Kirby tells reporters after an explosion destroyed a large dam in Ukraine. Asked if attacking the dam would constitute a war crime, Kirby says "it's very clear that the deliberate destruction of civilian infrastructure is not allowed by the laws of war." [COMPLETES VIDI33HA4QN_EN AND VIDI33HA43M_EN] IMAGES AND SOUNDBITES