Where the two presidents’ war of words will end is anybody’s guess. But if it continues, it could threaten the crucial operational help that Ukraine still gets from the United States.

© Tierney L. Cross/The New York Times

Where the two presidents’ war of words will end is anybody’s guess. But if it continues, it could threaten the crucial operational help that Ukraine still gets from the United States.

© Tierney L. Cross/The New York Times

Where the two presidents’ war of words will end is anybody’s guess. But if it continues, it could threaten the crucial operational help that Ukraine still gets from the United States.

© Tierney L. Cross/The New York Times

A huge attack cut power to 600,000 people in Kyiv, and a Pentagon-funded satellite internet program appeared to be curbed without warning.

© Evgeniy Maloletka/Associated Press

With the Russians intensifying sabotage, arson and cyberattacks against European nations supporting Ukraine, NATO divulged a blueprint, in case of war, to deter the Kremlin.

© Omar Marques/Getty Images