Western leaders will meet in the Spanish capital Madrid from Jun. 28 to Jun. 30 for what many are expecting to be the most important summit of the North Atlantic Treaty Organization (NATO) in recent decades. Just months after the invasion of NATO ally Ukraine, the 30 member states of the intergovernmental military alliance are keen to demonstrate their unity against Russian aggression. Leaders attending the two-day conference are expected to unveil a “transformative” approach to their security and defense strategy of the kind not seen since the Cold War, according to its Secretary General Jens Stoltenberg.