At talks in Antalya, Turkey, NATO Secretary-General Mark Rutte said that more investment and military equipment are needed to deal with the threat posed by Russia and terrorism.

The debate on defense spending is heating up ahead of a summit of U.S. President Donald Trump and his NATO counterparts in the Netherlands on June 24-25. It’s a high-level gathering that will set the course for future European security, including that of Ukraine.

Foreign ministers from NATO member states gathered in Antalya, Turkey, on Thursday to debate a U.S. proposal to significantly boost defense spending amid growing global threats and shifting American strategic priorities.