Passage: Incheon International Airport, opened in March 2001 in Yeongjong island, is now responsible for major international flights. Incheon International Airport is Asia's eighth busiest airport in terms of passengers, the world's fourth busiest airport by cargo traffic, and the world's eighth busiest airport in terms of international passengers in 2014. In 2016, 57,765,397 passengers used the airport.

Question: When was Asia's eight busiest airport opened?
2001