President Joe Biden will say in his United Nations address on Tuesday that the United States is opening a chapter of "intensive diplomacy" with allies and partners to deal with a host of challenges such as China, while denying any intention to start a new "Cold War," according to a senior U.S. official.Coinciding with the high-level week of the annual U.N. General Assembly, Biden will host the first in-person Quad summit with three other major Indo-Pacific democracies -- Japan, Australia and India -- at the White House on Friday and meet bilaterally with Japanese Prime Minister Yoshihide Su…READ FULL ARTICLE