John Simpson, in discussion with the BBC's unparalleled range of experts across the world, examines whether Ukraine is now preparing for a deal, assesses what’s at stake as Nato members prepare for their annual summit in Washington next month, and asks who owns the moon as we enter a new era of lunar exploration. As football's European Championship, the Euros, gets into full swing, he assesses why the beautiful game is coming under increasing scrutiny by regulators and fans alike.