Poland has shot down Russian drones after it says Moscow repeatedly violated its air-space. 

Poland's military has called it an "an act of aggression",  with the Polish prime minister announcing he has requested to invoke Article 4 of the NATO treaty, which formally starts urgent consultations within the alliance.

• Guest: Marta Prochwicz-Jazowska, Deputy Head of Office and Policy Fellow at the European Council on Foreign Relations
• Producer: Teodora Agarici