21.   Jones has pushed for China to open its military archives to U.S. researchers seeking clues to the fate of American MIAs.

22.   Scientists seek clues about ancient rise and fall of sea level.

23.   Seeking clues about the high rate of breast cancer among wealthy women, researchers have come up with some possible leads involving chemical exposure.

24.   Seeking clues to the motives behind the rampage, police in Erfurt said they were questioning parents and relatives of the gunman as well as students.

25.   Seeking clues to the motives behind the rampage, police in Erfurt said they were questioning relatives of the gunman as well as students.

26.   Researchers seeking clues about the high rate of breast cancer among wealthy women have found potential environmental factors, including professional lawn and dry-cleaning services.

27.   The bodies of the dead were being flown to the United States Thursday as investigators sought clues to those responsible for the carnage.

28.   The movies are of great interest to anyone seeking clues to life in the North.

29.   The sources said the questioning was routine as police seek clues from anyone who might have known Levy.

30.   The undecided election has taken its toll on the markets, as investors have sought some clue as to what economic direction the country is headed.