BONUS: Missiles landed on NATO territory. What happens next?

As the G20 was underway this week, global attention sharply focused on a tiny Polish village near the Ukrainian border. News came that a missile had killed two local residents. Russia insists it played no part in the incident, but as investigations progress, U.S. President Joe Biden, NATO Secretary General Jens Stoltenberg, and Polish President Duda all said preliminary findings indicate the explosion came from a Ukrainian air defense missile. What does this mean for Ukrainians, their supporters in the West, and Vladimir Putin? One Decision's Sir Richard Dearlove, former head of MI6 considers how this conflict is increasingly at risk of spilling beyond Russia's and Ukraine's borders.