U.S. embassy in Kyiv closes due to credible air attack threat

The U.S. embassy in Kyiv has closed due to a credible threat of a significant air attack. Embassy staff have been instructed to shelter in place, and U.S. citizens are advised to do the same during air alerts. This closure follows recent drone attacks on Kyiv, which resulted in damage to residential buildings. The situation has escalated, with more than a dozen casualties reported from intensified Russian aerial assaults. Additionally, Ukraine has launched its first strike on Russian territory using U.S.-supplied long-range missiles. In response, Russia has updated its nuclear doctrine, lowering the threshold for potential nuclear weapon use.