Ukrainian defense and national security officials are on their way to Washington to hammer out details of a proposed drone deal with the Trump administration, The Post has learned. Representatives of the Ukrainian Ministry of Defense and its National Security and Defense Council will be working with their American counterparts Tuesday through Friday as Washington and Kyiv aim to solidify a defense agreement that would bind the countries closer together. “Following the results of the negotiations between the presidents of Ukraine and the United States, a Ukraine delegation will arrive to Washington from Sept. 29 to Oct. 2 for technical...