2 South Korean air force planes collide and crash, killing 4

Two South Korean air force planes collided in mid-air during training and crashed near their base on Friday, killing all four people aboard the aircraft, officials said. Both planes were KT-1 trainer aircraft — South Korea's first indigenously developed planes — that took off from an air force base in the southeastern city of Sacheon one after another for flight training, the air force said in a statement.

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