Hanoi, July 21 -- The national flag carrier Vietnam Airlines has adjusted its flight schedules to ensure the safety of passengers and crew given the complicated developments of Typhoon Wipha, the third to hit the East Sea this year. The move came after the Civil Aviation Authority of Vietnam (CAAV) decided to close Van Don international airport in the northern coastal province of Quang Ninh and Cat Bi international airport in neighbouring Hai Phong city from 11 p.m. on July 21 to noon on July 22 in response to the storm. Accordingly, at Van Don airport, flights VN1286 and VN1287 between Ho Chi Minh City and Van Don has been rescheduled, with departures and arrivals expected after 2 p.m. on July 22. Also, at Cat Bi airport, flights VN1176 ...