31.   Speculation centered on Islamic radicals imprisoned there for plots to blow up the World Trade Center and the Holland Tunnel.

32.   Speculation centered on two groups.

33.   Speculation has centered mainly around Connecticut-based Oxford Health Plans and Anthem Insurance Companies of Indianapolis.

34.   Speculation centered on a stuck accelerator that would have prohibited Irwin from slowing enough to complete the turn.

35.   Speculation centers on a bending of the lines in the swift current or a collision with a barge.

36.   Speculation had centered on her son as a suspect, particularly early in the case.

37.   Speculation had centered on how many Cubans might use the opportunity to defect.

38.   Speculation has centered on German builder Walter Bau.

39.   Speculation has centered on Thailand, the epicenter of the currency crisis in Southeast Asia and a country with plenty of need for foreign credit.

40.   Speculation quickly centered on a patent filed by Kamen for a one-wheeled scooter, a self-propelled unicycle, if you will.