21.   In pursuing new source review cases without federal help, the greatest obstacle the Northeast states would face is geographic.

22.   In the end, the United States, which had pressed harder than any nation for the accord, threatened to become the greatest obstacle to its adoption.

23.   Michael Jordan and David Robinson said the greatest obstacle their fellow locked-out players may face was divisiveness.

24.   Silence and denial have been the two greatest obstacles to combating child abuse, especially among the clergy.

25.   Still, black female artists seem to face the greatest obstacles.

26.   That was among his prime qualifications for the job, and, paradoxically, it is proving among his greatest obstacles to success.

27.   The failure of HIV patients to correctly and consistently take their medication is the greatest obstacle in curing AIDS with drugs, leading AIDS researchers say.

28.   The greatest obstacle to its reception may be the fact that no one, least of all its creators, seems to know what to call it.

29.   The greatest obstacle to growth, however, is convincing software-bombarded banks to give it a try, he added.

30.   The greatest obstacle to UC cited by students and counselors is lack of money.