11.   Airline mechanics inspect aircraft and can recommend delaying or canceling a flight by citing small flaws unrelated to airworthiness conditions.

12.   But a more prosaic explanation for sightings attributed to the extraterrestrial is that they are actually flights by aircraft over the nearby Nellis Air Force Base.

13.   Bruce Babbitt, the secretary of the interior, announced Tuesday new restrictions on flights by small airplanes and helicopters that carry tourists over the Grand Canyon.

14.   But others said the administration had allowed provocative flights by the exile group, Brothers to the Rescue, to continue, despite repeated warnings from the Cuban government.

15.   But the Japanese have until now resisted efforts to provide the final link on trans-Pacific flights by adopting it themselves.

16.   But the U.S. commitment prompted a flight by currency traders out of dollars Thursday and into less debt-laden currencies like the German mark and the Japanese yen.

17.   Colley is equally giddy over the native skimmer, with orange legs and beak, which feeds while in flight by dropping its lower mandible into the water.

18.   Delta and Air France jointly sell seats on trans-Atlantic flights by regular jets, including those operated by the two carriers between Atlanta and Paris.

19.   Flights by most Venezuelan airlines to the U.S. have also been suspended, officials said.

20.   Flights by smog-tracking planes map plumes of pollution traveling many miles.