AFRICANGLOBE - Nigeria's Senior Special Assistant to the President on Foreign and Diaspora Affairs, Abike Dabiri-Erewa, has advised Nigerians to postpone their travel plans to the United States. "In the last few weeks, the office has received a few cases of Nigerians with valid multiple-entry US visas being denied entry and sent back to Nigeria. “In such cases reported to the office, such affected persons were sent back immediately on the next available flight and their visas were cancelled,” she said.