How did the 9 helicopters that celebrated the 70th anniversary of Dien Bien Phu victory raise the flag?

The 70th anniversary of Dien Bien Phu victory will have 9 helicopters flying to perform flag raising. To keep these flags flying in the wind, the Air Defense - Air Force Service used a special method.

Each helicopter will be equipped with a weight of more than 120kg to stretch the cable, helping the flags to fly most beautifully in the sky.

Vietnamnet.vn