NEW YORK: The United States is withholding a visa for Sudanese army chief Abdel Fattah al-Burhan ahead of his scheduled UN appearance in a move that Sudanese and other sources say is linked to a US-backed ceasefire proposal that Khartoum has resisted. The dispute threatens to deepen tensions between Washington and Sudan’s army at a critical moment in the civil war, which the United Nations calls the world’s largest humanitarian crisis. A senior Sudanese source said Burhan had postponed his trip
