<h1>NATO summit faces divisions over proposed 5% GDP defense spending target requiring unanimous approval</h1> NATO leaders gather for a potentially divisive summit as disagreements emerge over defense spending targets. The US administration proposed a 5% GDP defense spending goal, but one European nation rejected it as 'unreasonable,' while the alliance requires unanimous consensus from all 32 members. Current spending varies significantly among allies, with some countries spending less than 2% of GDP on defense. The summit faces additional complications from recent military actions in Iran and uncertainty over Ukraine's role in discussions. European allies want Ukraine prioritized on the agenda, though the administration's position remains unclear. The alliance's collective security guarantee underpins its credibility, but questions about commitment levels have created uncertainty about deterrence effectiveness.