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NATO foreign ministers begin to gather for a ceremony to mark the 75th anniversary of NATO at NATO headquarters in Brussels, Thursday, April 4, 2024. NATO celebrates on Thursday 75 years of collective defense across Europe and North America as Russia's war on Ukraine enters its third year. (AP Photo/Virginia Mayo)
Poland's Foreign Minister Radoslaw Sikorski, center, addresses the audience as he stands behind the original Washington Treaty during a ceremony to mark the 75th anniversary of NATO at NATO headquarters in Brussels, Thursday, April 4, 2024. NATO marked on Thursday 75 years of collective defense across Europe and North America, with its top diplomats vowing to stay the course in Ukraine as better armed Russian troops assert control on the battlefield. (AP Photo/Geert Vanden Wijngaert)
NATO foreign ministers and other gather for a ceremony to mark the 75th anniversary of NATO at NATO headquarters in Brussels, Thursday, April 4, 2024. NATO celebrates on Thursday 75 years of collective defense across Europe and North America as Russia's war on Ukraine enters its third year. (AP Photo/Virginia Mayo)
FILE - U.S. President Donald Trump checks his watch as NATO Secretary General Jens Stoltenberg stands beside him, at the Art and History Museum at the Park Cinquantenaire in Brussels, July 11, 2018. NATO is set to celebrate on Thursday, April 4, 2024, 75 years of collective defense across Europe and North America as Russia's war on Ukraine enters its third year. (AP Photo/Geert Vanden Wijngaert, File)
Two military personnel stand underneath the flags of NATO alliance members during wreath laying ceremony at NATO headquarters in Brussels, Thursday, April 4, 2024. NATO celebrates on Thursday 75 years of collective defense across Europe and North America as Russia's war on Ukraine enters its third year. (AP Photo/Virginia Mayo)
Canada's Foreign Minister Melanie Joly, left, speaks with United States Secretary of State Antony Blinken as they attend a ceremony to mark the 75th anniversary of NATO at NATO headquarters in Brussels, Thursday, April 4, 2024. NATO marked on Thursday 75 years of collective defense across Europe and North America, with its top diplomats vowing to stay the course in Ukraine as better armed Russian troops assert control on the battlefield. (AP Photo/Geert Vanden Wijngaert)
NATO Secretary General Jens Stoltenberg, right, and Belgium's Foreign Minister Hadja Lahbib cut a cake during a ceremony to mark the 75th anniversary of NATO at NATO headquarters in Brussels, Thursday, April 4, 2024. NATO marked on Thursday 75 years of collective defense across Europe and North America, with its top diplomats vowing to stay the course in Ukraine as better armed Russian troops assert control on the battlefield. (AP Photo/Geert Vanden Wijngaert)
FILE - NATO Secretary General Jens Stoltenberg, center left, speaks with Ukraine's President Volodymyr Zelenskyy, right, on arrival prior to a meeting of NATO defense ministers at NATO headquarters in Brussels, Wednesday, Oct. 11, 2023. NATO is set to celebrate on Thursday, April 4, 2024, 75 years of collective defense across Europe and North America as Russia's war on Ukraine enters its third year. (AP Photo/Virginia Mayo, File)
/from left, Romania's Foreign Minister Luminita-Teodora Odobescu, Belgium's Foreign Minister Hadja Lahbib and British Foreign Secretary David Cameron cut a cake during a ceremony to mark the 75th anniversary of NATO at NATO headquarters in Brussels, Thursday, April 4, 2024. NATO marked on Thursday 75 years of collective defense across Europe and North America, with its top diplomats vowing to stay the course in Ukraine as better armed Russian troops assert control on the battlefield. (AP Photo/Geert Vanden Wijngaert)
FILE - Belgium's Premier and Foreign Minister Paul-Henri Spaak, seated center, tests a new pen before signing the North Atlantic Pact in Washington, DC, April 4, 1949, flanked by Belgium's Ambassador to the U.S., Baron Silvercruys, left, and John W. Foley of the U.S. State Department. Seated behind, from left, are Britain's Ernest Bevin, Norway's Halvard Lange, Luxembourg's Joseph Bech, Iceland's Bjarni Benediktsson, Denmark's Gustav Rasmussen, U.S. President Harry S. Truman, U.S. Secretary of State Dean Acheson; Canada's Lester Pearson, France's Robert Schuman, Italy's Count Carlo Spforza, Holland's Dirk Stikker and Portugal's Jose Caeiro Da Matta. NATO is set to celebrate on Thursday, April 4, 2024, 75 years of collective defense across Europe and North America as Russia's war on Ukraine enters its third year. (AP Photo, File)
From left, Sweden's Foreign Minister Tobias Billstrom, Germany's Foreign Minister Annalena Baerbock, Canada's Foreign Minister Melanie Joly, United States Secretary of State Antony Blinken, Luxembourg's Foreign Minister Xavier Bettel, British Foreign Secretary David Cameron and Poland's Foreign Minister Radoslaw Sikorski attend a ceremony to mark the 75th anniversary of NATO at NATO headquarters in Brussels, Thursday, April 4, 2024. NATO marked on Thursday 75 years of collective defense across Europe and North America, with its top diplomats vowing to stay the course in Ukraine as better armed Russian troops assert control on the battlefield. (AP Photo/Geert Vanden Wijngaert)
British Foreign Secretary David Cameron, second right, and Poland's Foreign Minister Radoslaw Sikorski, second left, attend a ceremony to mark the 75th anniversary of NATO at NATO headquarters in Brussels, Thursday, April 4, 2024. NATO marked on Thursday 75 years of collective defense across Europe and North America, with its top diplomats vowing to stay the course in Ukraine as better armed Russian troops assert control on the battlefield. (AP Photo/Geert Vanden Wijngaert)
The U.S. flag flaps in the wind as a plane flies over during wreath laying ceremony at NATO headquarters in Brussels, Thursday, April 4, 2024. NATO celebrates on Thursday 75 years of collective defense across Europe and North America as Russia's war on Ukraine enters its third year. (AP Photo/Virginia Mayo)
FILE - Sweden's Foreign Minister Tobias Billstrom, left, speaks with Turkey's Foreign Minister Hakan Fidan during a meeting of the North Atlantic Council in foreign ministers format at NATO headquarters in Brussels, Wednesday, April 3, 2024. NATO is set to celebrate on Thursday, April 4, 2024, 75 years of collective defense across Europe and North America as Russia's war on Ukraine enters its third year. (AP Photo/Geert Vanden Wijngaert, File)
Romania's Foreign Minister Luminita-Teodora Odobescu, fourth left, and Netherland's Foreign Minister Hanke Bruins Slot, center, speaks with Luxembourg's Foreign Minister Xavier Bettel, second right, and Canada's Foreign Minister Melanie Joly, right, during a meeting of the NATO-Ukraine Council at NATO headquarters in Brussels, Thursday, April 4, 2024. NATO celebrates on Thursday 75 years of collective defense across Europe and North America as Russia's war on Ukraine enters its third year. (AP Photo/Geert Vanden Wijngaert)
NATO Secretary General Jens Stoltenberg bangs a gavel to signify the start of a meeting of the NATO-Ukraine Council at NATO headquarters in Brussels, Thursday, April 4, 2024. NATO celebrates on Thursday 75 years of collective defense across Europe and North America as Russia's war on Ukraine enters its third year. (Johanna Geron, Pool Photo via AP)
FILE - Ukraine's President Volodymyr Zelenskyy addresses a media conference prior to a meeting of NATO defense ministers at NATO headquarters in Brussels, Wednesday, Oct. 11, 2023. NATO is set to celebrate on Thursday, April 4, 2024, 75 years of collective defense across Europe and North America as Russia's war on Ukraine enters its third year. (AP Photo/Virginia Mayo, File)
FILE - U.S. soldiers, part of the NATO- led International Security Assistance Force (ISAF), walk as a U.S. Chinook helicopter is seen on the back ground in Shindand, Herat, west of Kabul, Afghanistan, Saturday, Jan. 28, 2012. NATO is set to celebrate on Thursday, April 4, 2024, 75 years of collective defense across Europe and North America as Russia's war on Ukraine enters its third year. (AP Photo/Hoshang Hashimi, File)
NATO Secretary General Jens Stoltenberg, center left, stands with NATO's Chairman of the Military Committee Admiral Rob Bauer and NATO Deputy Secretary General Mircea Geoana during a wreath laying ceremony at NATO headquarters in Brussels, Thursday, April 4, 2024. NATO celebrates on Thursday 75 years of collective defense across Europe and North America as Russia's war on Ukraine enters its third year. (AP Photo/Virginia Mayo)
Germany's Foreign Minister Annalena Baerbock, second right, speaks with Ukraine's Foreign Minister Dmytro Kuleba during a meeting of the NATO-Ukraine Council at NATO headquarters in Brussels, Thursday, April 4, 2024. NATO celebrates on Thursday 75 years of collective defense across Europe and North America as Russia's war on Ukraine enters its third year. (AP Photo/Geert Vanden Wijngaert)
FILE - U.S. President Joe Biden, center, greets Netherland's Prime Minister Mark Rutte, left, prior to a round table meeting during an extraordinary NATO summit at NATO headquarters in Brussels, Thursday, March 24, 2022. NATO is set to celebrate on Thursday, April 4, 2024, 75 years of collective defense across Europe and North America as Russia's war on Ukraine enters its third year. (AP Photo/Markus Schreiber, File)