The battleships, war planes, missiles and potential pool of more than 3 million personnel are owned and brought to the range by the 28 member states, mostly at their own cost. The only military equipment NATO has is a fleet of early warning radar planes and, from next year, five surveillance drones. The alliance's meetings — the North Atlantic Council, held at ambassadorial level almost weekly in Brussels, less often at the level of ministers or heads of state and government — are chaired by NATO Secretary-General Jens Stoltenberg. On the ground, NATO has notably helped to keep peace in the Balkans and combat the Taliban-led insurgency in war-torn Afghanistan — the alliance's biggest ever operation, launched after the United States triggered its "all for one and one for all" common defense clause in the wake of the Sept.