Volodymyr Zelenskiy is asking Western allies to speed up deliveries of air-defense systems and interceptor missiles to prepare for another winter of intense bombing that could prove to be the next critical moment in Kyiv’s battle to resist the Russian invasion.

Russia and Ukraine launched major attacks on each other Friday, with a two-day unilateral ceasefire that Moscow had declared around its World War II commemorations appearing to be in tatters.

How a mint-green research base, 14 scientists, and a gentoo penguin colony became part of Ukraine's war strategy.

Tense relations soured further after Ukraine accused Israel of buying grain harvested by Russia in occupied territory. Meanwhile, Russia and Iran have grown closer.

Zelenskyy is seeking to legalize private military firms in Ukraine, potentially giving the country's some 900,000 troops postwar career opportunities.

Kremlin officials said a large strike on Kyiv would be “inevitable” if Ukraine disrupted the May 9 event, a prospect President Volodymyr Zelensky has appeared to allude to.

Russia and Ukraine accused each other on Friday of violating a unilateral two-day ceasefire announced by Russian President Vladimir Putin to cover the anniversary celebrations of the Soviet Union's victory over Nazi Germany.

We unpack a week of whiplash in the Iran war, with the President quickly calling off an effort to take control of the Strait of Hormuz, citing progress on talks. But a blockade remains. Pentagon correspondent Tom Bowman and Moscow correspondent Charles Maynes discuss the shifting messages and what's happening diplomatically behind the scenes.

Ukrainian President Volodymyr Zelensky on Thursday warned allies of Russia against attending its May 9 WWII victory parade, as Moscow doubled down on its threat to strike Kyiv on the day.