US Vice President JD Vance may have postponed his trip to Switzerland for the signing of a memorandum of understanding between the United States and Iran because of Tehran’s demands regarding Lebanon MOSCOW, June 19. /TASS/. Negotiations between the United States and Iran, which were scheduled to take place on June 19 in the Swiss resort of Burgenstock, will not take place, Reuters news agency reported, citing the Swiss Federal Department of Foreign Affairs. TASS has compiled key details about