Passengers scan their passports at automated immigration gates at the newly-opened Changi International Airport's Terminal 4 in Singapore on October 31, 2017. 
Singapore's newly-opened automated Changi International airport Terminal 4 began full operations on October 31. The cutting edge terminal, which is half the size of Terminal 3 at 225,000 square meters, makes it Changi Airport's smallest terminal. / AFP PHOTO / ROSLAN RAHMAN
Changi International Airport's Terminal 4 has been placed on standby since May 16 until air travel demand picks up and a sufficient number of flights return to the terminal. AFP

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