Some sirens sound in Poland’s disputed memorial observance


              Poland's deputy prime minister and key politician, Jarosław Kaczynski,right, pays respect to his twin, the late President Lech Kaczynski, on the 12th anniversary of a plane crash in Russia that killed the president and 95 other prominent Poles, at the monument to the victims in Warsaw, Poland, on Sunday, April 10, 2022. At a time of Russia's war on Ukraine, Poland's government has revived its controversial allegations that the crash was the Kremlin's assassination plan. (AP Photo/Czarek Sokolowski)
            
              Poland's deputy prime minister and key politician, Jarosław Kaczynski,left, pays respect to his twin, the late President Lech Kaczynski, on the 12th anniversary of a plane crash in Russia that killed the president and 95 other prominent Poles, at the monument to the victims in Warsaw, Poland, on Sunday, April 10, 2022. At a time of Russia's war on Ukraine, Poland's government has revived its controversial allegations that the crash was the Kremlin's assassination plan. (AP Photo/Czarek Sokolowski)
            
              A woman holds a child on her shoulders as she waits in a line after fleeing the war from neighboring Ukraine at the border crossing in Medyka, southeastern Poland, Sunday, April 10, 2022. (AP Photo/Sergei Grits)
            
              Refugees wait in a line after fleeing the war from neighboring Ukraine at the border crossing in Medyka, southeastern Poland, Sunday, April 10, 2022. (AP Photo/Sergei Grits)
            
              A volunteer covers a refugee with a blanket as she waits in a line after fleeing the war from neighboring Ukraine at the border crossing in Medyka, southeastern Poland, Sunday, April 10, 2022. (AP Photo/Sergei Grits)
            
              Volunteers help a refugee after fleeing the war from neighboring Ukraine at the border crossing in Medyka, southeastern Poland, Sunday, April 10, 2022. (AP Photo/Sergei Grits)
            
              Poland's deputy prime minister and key politician, Jarosław Kaczynski,left, pays respect to his twin, the late President Lech Kaczynski, on the 12th anniversary of a plane crash in Russia that killed the president and 95 other prominent Poles, at the monument to the victims in Warsaw, Poland, on Sunday, April 10, 2022. At a time of Russia's war on Ukraine, Poland's government has revived its controversial allegations that the crash was the Kremlin's assassination plan. (AP Photo/Czarek Sokolowski)
            
              Poland's deputy prime minister and key politician, Jarosław Kaczynski,left, pays respect to his twin, the late President Lech Kaczynski, on the 12th anniversary of a plane crash in Russia that killed the president and 95 other prominent Poles, at the monument to the victims in Warsaw, Poland, on Sunday, April 10, 2022. At a time of Russia's war on Ukraine, Poland's government has revived its controversial allegations that the crash was the Kremlin's assassination plan. (AP Photo/Czarek Sokolowski)
            
              Poland's deputy prime minister and key politician, Jarosław Kaczynski,center, pays respect to his twin, the late President Lech Kaczynski, on the 12th anniversary of a plane crash in Russia that killed the president and 95 other prominent Poles, at the monument to the victims in Warsaw, Poland, on Sunday, April 10, 2022. At a time of Russia's war on Ukraine, Poland's government has revived its controversial allegations that the crash was the Kremlin's assassination plan. (AP Photo/Czarek Sokolowski)
Some sirens sound in Poland’s disputed memorial observance