"I just heard another message about unidentified aircraft heading southwest."

At 7:00 on the 21st, the Germans spotted four unidentified aircraft, though they quickly departed.

He would have received an order - stop the unidentified aircraft by any means possible.

In passing the information on they described them simply as 'unidentified aircraft'.

Along the way, many reports came in of submarines, torpedoes, and unidentified aircraft.

Now they had unidentified aircraft bearing down on them.

If that does not force the plane to land, the pilot is then authorized to shoot down the unidentified aircraft.

The unit is on 24/7 readiness to intercept unidentified aircraft over Germany.

Japanese Army camps were in sight on the shore, and unidentified aircraft passed overhead during the night.

A few minutes later, 50 unidentified aircraft flew over the airfield.