With future military aid looking uncertain, uncomfortable questions are being asked as to what "victory" Ukraine could realistically achieve against Russia.
The Associated Press has learned that the Ukrainian Defence Forces have withdrawn US-supplied Abrams tanks from the front line because of the threat of attacks by Russian drones, while the Americans complain that the Ukrainians are not using the equipment more effectively.
The sidelining of the Abrams reflects evolving battlefield tactics where drone use has made it virtually impossible for them to maneuver without detection.
Russia launched a "massive" missile strike at Ukraine overnight, damaging four power plants in the latest barrage targeting the country's energy supply, officials in Kyiv said on Saturday.
Two people were wounded after Russia launched a "massive attack" on energy infrastructure in Ukraine overnight from Friday to Saturday, Kyiv's armed forces and local authorities said.
Russia has ceased its use of Shahed kamikaze drones against Ukraine for several days, suggesting potential preparation for a large-scale attack, Ukrainian Air Force spokesman Illya Yevlash said on national television on April 26.