Two Vietnamese Su-22 pilots are missing at sea after their fighters collided in mid-air on Apr. 16.
![aircraft_ylfc[1]](http://alert5.com/wp-content/uploads/2015/04/aircraft_ylfc1-500x334.jpg)
Photo: Tan Tu
Both jets were flying off the coast of south-central Binh Thuan province around noon local time before contact was lost.
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