After a week of high-stakes diplomacy aimed at halting the war in Ukraine, United States President Donald Trump says he is set on arranging a summit between Russian President Vladimir Putin and Ukrainian President Volodymyr Zelenskyy.Following separate meetings with both leaders, Trump has ruled out sending US troops to Ukraine, but pledged security guarantees to Kyiv and indicated that Washington could provide air support to reinforce a potential deal.Ukraine, in turn, told reporters at the White House it would obtain US-made weapons purchased by Europeans for an estimated $90bn as part of the effort to bolster its defences.Which countries are aiding Ukraine?At least 41 countries have contributed to Ukraine’s war efforts monetarily, either through military, humanitarian or financial assistance, according to the Kiel Institute for the World Economy, a German think tank.Military assistance includes weapons, equipment and financial aid for the Ukrainian military. Humanitarian relief covers medical, food and other items for civilians, while financial assistance comes in the form of grants, loans and guarantees.Most contributions to Ukraine have come from NATO, with 29 of its 32 members providing monetary aid, according to the Kiel Institute.Additionally, 12 non-NATO countries and territories have sent monetary aid to Ukraine. These include Australia, Austria, Cyprus, the Republic of Ireland, Japan, Malta, New Zealand, South Korea, S …