51.  When his wife developed lung cancer, Wheelwright dived into research and experiments with laetrile and other controversial drugs in an unsuccessful effort to cure her.

52.  Yemen sought help from an international police agency in an unsuccessful effort to apprehend Bin Laden.

53.  Other diplomats want to avoid a change in U.N. membership as a bargaining chip in so-far unsuccessful efforts to negotiate a peaceful settlement to the Afghan crisis.

54.  After an unsuccessful effort by Egypt Air officials, Ghana national security officials were called in to negotiate.

55.  After Khatami was elected, the Clinton administration undertook a mostly unsuccessful effort to engage Tehran in a dialogue.

56.  Defense attorneys cited their unsuccessful effort to suppress a videotape of the police interview with Clark as one of several possible grounds for appeal.

57.  FBI Director Louis J. Freeh has traveled to Saudi Arabia several times in unsuccessful efforts to win permission for his agents to interview the Saudi suspects.

58.  For months they have led unsuccessful efforts in parliament to get Yeltsin impeached.

59.  He also has been at the center of so far unsuccessful efforts to regain Navy use of the Vieques training range in Puerto Rico.

60.  His lawsuit against BASF Group, Hoechst AG, Bayer Group and Messerschmidt-Boelkow-Blohm follows his unsuccessful efforts to sue Germany in U.S. courts.