Venezuela has sent a letter to the UN chief asking him to take measures against the United States over the denial of visas for some members of its delegation who are scheduled to attend the UN General Assembly in New York. The letter sent by Venezuela’s ambassador to the UN, Samuel Moncada, requests that the Secretary General Ban Ki-moon take action in response to the apparent denial of visas, which President Maduro has said seems intended to “create logistical obstacles to impede” next week’s visit.