But military doctors worry that the flap could come loose during combat, especially in a supersonic fighter.

It was his first ride in a supersonic fighter of any kind.

Vector - An specialist on supersonic fighters and a cosmonaut.

J-12 - a 1970 Chinese lightweight supersonic fighter, Development abandoned in 1977.

It is a supersonic fighter, and first flew in 1956.

More than 10,000 have been made, which is more than any supersonic fighter ever.

Both were essential to flying such an advanced supersonic fighter and that the F-16 was.

The government in Brasília has set aside $700 million to buy up to 24 supersonic fighters.

The Czechs alone want up to 36 supersonic fighters, worth a potential $2 billion.

But Embraer has no plans to graduate on its own to supersonic fighters.