The Supreme Allied Commander of NATO, U.S. General Alex Grynkewich, has announced that European allies have largely filled the military equipment gaps left by the United States' decision to reduce its contributions in times of crisis. This development comes ahead of a summit between President Donald Trump and his counterparts in Turkey on July 7-8, where force planning is a key agenda item. The reductions include the withdrawal of an aircraft carrier, support ships, aerial refueling planes, and fighter jets among other assets. Grynkewich noted that there are still a few areas where European allies do not have capabilities to replace those withdrawn, but alternate solutions are being considered. This decision by the Pentagon to reduce contributions was unexpected for many NATO allies, who are now reviewing their inventories to determine what resources they can offer in case of an attack. The move has been downplayed by NATO Secretary-General Mark Rutte, who believes that the U.S. would shift more resources to Europe should conflict arise. This is based on the historical precedent of increased U.S. involvement during the war on Iran. Under NATO's collective security guarantee, an attack on one member country is considered an attack on all, although it does not obligate members to provide military support.