11.   Alien aircraft came in low, dropping bombs, firing torpedoes, sending burning ships slipping under the sea.

12.   But it seemed to confirm that the aircraft had come apart, either in the air or upon impact with the ocean.

13.   But the aircraft have come under heated fire from congressional critics and some in the Pentagon.

14.   Georgia said the aircraft came from Russia, and its air force threatened to shoot down any planes that enter its territory.

15.   Little information was available Wednesday night on the cause of the crash, but officials said they had no evidence that the aircraft had come under hostile fire.

16.   Many manufacturers and suppliers of equipment when aircraft first came into production are no longer in business.

17.   On Tuesday, Bosnian forces in Zepa had threatened to use the Ukrainians as human shields against a Serbian attack if NATO aircraft did not come to their aid.

18.   Over the long-term, Bush said, airlines may seek to build a fleet that can be landed safely by remote control if the aircraft come under siege.

19.   Pilotless aircraft came into their own in the Afghan conflict, greatly reducing casualties in U.S. Air Force and ground troops on both reconnaissance and attack missions.

20.   The aircraft must have come from our own future.