1.   A Delta airliner made an emergency landing Friday at Hartsfield International Airport following reports of smoke in an engine.

2.   An airliner made an unscheduled landing after a passenger who was upset about his seating arrangement made a comment about a bomb, officials said.

3.   The airliner was making a visual landing approach, officials said.

4.   The airliner was making a visual, not instrumental, landing approach when it disappeared, officials said.