Russia President Putin cited Ukraine's potential membership in NATO, the North Atlantic Treaty Organization, as part of the justification for the current war.
What was he so concerned about? And is Ukraine going to join the western military alliance?
Sunday on Full Measure, I'll take you on an exclusive trip inside NATO Allied Air Command at Ramstein Air Base in Germany.
We're the first US crew allowed inside the command center that was built especially to coordinate air operations related to the Russia-Ukraine war.
The visit unearthed fascinating insight on why Ukraine was never imminently going to join NATO, and what makes Putin so concerned about the balance of military power in his part of the world.
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