21.   The plane went down in a remote mountainous region after the pilot aborted a landing attempt.

22.   There, a Viking also circles the ship until every jet lands, in case one needs a last quarter tank after missing a landing attempt.

23.   Weiler said the experience gained in the NEAR landing attempt on Eros can be applied in about a decade when NASA may launch a landing mission to a comet.

24.   Wy Gowell, assistant director at the airport, said the plane apparently developed engine trouble during its second landing attempt.

25.   A first landing attempt was abandoned due to extremely difficult conditions, the spokesman said.

26.   After two landing attempts, the control tower lost communication with the cockpit, the agency quoted a company spokesman as saying.

27.   After two landing attempts, the control tower lost communication with the pilot on its third approach, the agency quoted a company spokesman as saying.

28.   Both Bergen and Orr said they did not know why the pilot aborted the first landing attempt.

29.   Cloud cover over the Kennedy Space Center at Cape Canaveral, Florida, has forced NASA to delay the first landing attempt of the shuttle Columbia, NASA said.

30.   Cloud cover over the Kennedy Space Center at Cape Canaveral, Florida, has forced NASA to delay the first landing attempt of the shuttle Atlantis, NASA said.