This week all eyes are on the NATO summit taking place in Washington DC, marking the military alliance’s 75th anniversary with a collective message about unity. 

NATO leaders will discuss various topics, but the elephant in the room is the potential membership of Ukraine. But what other issues will be on the agenda, and which factors challenge NATO’s unity? 

To dive into the NATO summit and the leaders' priorities I’m joined by our politics reporter Aurélie Pugnet.