51.   The speech nonetheless marked a milestone in public openness about the disease.

52.   The space station, meanwhile, marks a milestone Thursday.

53.   The summit with then-President Bush and three Latin American presidents marked a milestone in international drug cooperation.

54.   Gay rights advocates immediately denounced the bill, but said the vote itself marked a milestone.

55.   The pigs -- Noel, Angel, Star, Joy and Mary -- were said to mark a milestone in the development of animal to human transplants.

56.   The visit of the Argentine president marks a milestone in the relations of the two nations.

57.   Pyongyang claimed on Thursday that the agreement marked a milestone on the road to demilitarizating the Korean pensinsula, divided between two mutually hostile states.

58.   Pyongyang said Thursday the agreement marked a milestone on the road to demilitarizating the Korean pensinsula.