Rescue servicemen extinguish a bush fire after shelling in Mykolaivka, Donetsk region, eastern Ukraine, on Friday. Evgeniy Maloletka/AP hide caption
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National Security
Friday
Satellite imagery from Friday appears to show dolphin pens at the entrance to Sevastopol's harbor. The naval base there is important to the Russian military because of its proximity to the Crimean Peninsula. Satellite image ©2022 Maxar Technologies hide caption
Thursday
Firefighters try to put out a fire following an explosion in Kyiv on Thursday, the same day of a visit by the head of the United Nations. Emilio Morenatti/AP hide caption
Wednesday
Poland's Prime Minister Mateusz Morawiecki speaks to media at the gas station of Gaz-System in Rembelszczyzna, near Warsaw, Poland, on Wednesday. Polish and Bulgarian leaders accused Moscow of using natural gas to blackmail their countries after Russia's state-controlled energy company stopped supplying the two European nations Wednesday. Czarek Sokolowski/AP hide caption
Pallets of aid to Ukraine are stacked behind Secretary of Defense Lloyd Austin (right) and Secretary of State Antony Blinken as they speak with reporters after returning from their trip to Kyiv, Ukraine, and meeting with Ukrainian President Volodymyr Zelensky, on Monday in Poland. Alex Brandon/POOL/AFP via Getty Images hide caption
U.S. war aims shift in Ukraine — and bring additional risks
Tuesday
Airmen and civilians from the 436th Aerial Port Squadron place ammunition, weapons and other equipment on pallets bound for Ukraine at Dover Air Force Base in Delaware on Jan. 21, 2022. Mauricio Campino/U.S. Air Force via AP hide caption
April 28: Emergency services work at the site where fires were triggered by an explosion in Kyiv, Ukraine. Russia struck the Ukrainian capital of Kyiv shortly after a meeting between President Volodymyr Zelenskyy and U.N. Secretary-General António Guterres on Thursday evening. Emilio Morenatti/AP hide caption
Kyiv Mayor Vitali Klitschko (right) and his brother Wladimir Klitschko check a phone at city hall on Feb. 27. When Russia invaded Ukraine, many expected Moscow to knock out the Ukrainian communications network. But Ukrainian systems, for both civilians and the military, continue to function. Ukraine, meanwhile, has regularly intercepted Russian military communications. Efrem Lukatsky/AP hide caption
How does Ukraine keep intercepting Russian military communications?
Australian shadow foreign affairs minister Penny Wong speaks to media in Darwin, Australia, Tuesday, April 26, 2022. Australia's opposition party promises to establish a Pacific defense school to train neighboring armies in response to China's potential military presence on the Solomon Islands. George Fragopoulos/AP hide caption
Monday
Russian tanks roll along a street in an area controlled by Russian-backed separatist forces in Mariupol, Ukraine, on April 23, 2022. Alexei Alexandrov/AP hide caption
Sunday
Secretary of State Antony Blinken, pictured in Washington, D.C., on Friday, traveled to Ukraine and met with Ukrainian President Volodymyr Zelenskyy on Sunday. Susan Walsh/Pool/AFP via Getty Images hide caption
U.S. Air Force Maj. Gen. William T. Cooley speaks during a press conference inside the National Museum of the United States Air Force on Wright-Patterson Air Force Base in 2019. Wesley Farnsworth/AP hide caption
Friday
People walk near a destroyed tank and damaged buildings in the southern port city of Mariupol, Ukraine, on Friday. Alexander Ermochenko/Reuters hide caption
Activists demonstrate in front of a ship carrying Russian oil in the Baltic Sea this spring. The U.S. has imposed sanctions on Russian oil. However, most countries have not, and refineries around the world still import Russian oil. Frank Molter/dpa/picture alliance via Getty Images hide caption