41.   Smith sees serious obstacles.

42.   Some serious obstacles still remain, and Putin noted them Tuesday.

43.   Still, serious obstacles face the proposed European legislation, and enactment is far from certain.

44.   Such technical problems represent serious obstacles to researchers.

45.   The Americans intend to ask him to work with both parties when serious obstacles appear.

46.   The Chinese authorities themselves are ultimately the most serious obstacle to smooth relations.

47.   The effort to undo Glass-Steagall now faces serious obstacles.

48.   The glut of genocide cases, however, poses a serious obstacle.

49.   The most serious obstacle UConn faces is Arkansas.

50.   The service that led a revolution in online music swapping still faces serious obstacles.