LUGANO, Switzerland -- A top U.S. diplomat on Tuesday urged allies of Ukraine to help the war-battered country meet its “immediate and urgent” needs — not only longer-term rebuilding — as scores of countries wrapped up a two-day conference aimed at helping Ukraine recover from Russia's war, when it ends one day. Scott Miller, the U.S. ambassador to Switzerland, added a dose of urgency to the Ukraine Recovery Conference in Lugano, at which the Ukrainian prime minister a day earlier presented a $750 billion plan to help his country both recover now — where possible — as well as in the immediate aftermath of the war and over the long term. Many attendees pointed out that efforts were likely to take many years, and rebuilding would need to take place in several phases. Some called for support for Ukraine along the lines of the U.S. Marshall Plan for Europe after World War II — hinting of a big long-term project. “While we recognize the importance of preparing for Ukraine’s future, all of us must also deliver on our commitments to provide Ukraine its immediate and urgent needs,” said Miller, one of many government envoys who decried Russia's war and detailed their support for Ukraine.