World leaders from members of NATO gather for their annual summit in Watford, Hertfordshire, England.
Ukraine and NATO forces launch joint naval drills in the Black Sea codenamed "Sea Breeze 2021". Russia has condemned the drills, with the Russian Defence Ministry saying that they would closely monitor the drills.
Four neo-Nazis are convicted of attempting to incite racial hatred at Aston University in England by carrying out a sticker recruitment campaign for National Action. A fifth is acquitted and sentencing alongside two other convicts is set for June 1. National Action has since been banned as a terror group.
The Latvian Defense Ministry said four NATO fighter jets from the Lithuanian Air Force Base near Šiauliai were deployed when two Russian bombers flying in the neutral airspace almost entered Latvian air space.