KYIV, Ukraine (AP) — Unbowed Western powers pledged to supply Ukraine with more potent air defense systems following a furious barrage of retaliatory Russian missile strikes, including one that temporarily knocked Europe's biggest nuclear plant off the invaded country's electrical grid Wednesday.

The Russian-occupied Zaporizhzhia Nuclear Power Plant suffered a “blackout†when a missile damaged a distant electrical substation, Ukraine's state nuclear operator said. The power loss increased the risk of because the plant needs electricity to prevent its reactors from overheating.

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