NATO allies are gathering in Ankara for a critical summit aimed at addressing U.S.President Donald Trump's demands for increased defense spending and greater European responsibility in security matters.

The two-day meeting follows a year of pledges by NATO members to raise military expenditures to 5% of GDP, a commitment driven by pressure from Trump, who has criticized Europe's response to the Iran conflict.

Canada's announcement to partner with Germany's Thyssenkrupp Marine Systems for a $12 billion submarine program underscores efforts to strengthen defense ties with European allies.However, Trump's recent outbursts, including accusations that Europe is not reciprocating U.S.support, have heightened tensions.NATO Secretary-General Mark Rutte emphasized progress in shifting toward a 'NATO 3.0' model, where Europe takes greater responsibility for its security.

Meanwhile, Ukraine's President Volodymyr Zelensky seeks renewed military aid commitments from allies, as the alliance navigates balancing Trump's demands with maintaining unity.

The summit's success hinges on managing Trump's mercurial temperament while reinforcing NATO's collective defense posture amid geopolitical uncertainties.