51.   The fact that Bush has not yet named an environmental negotiator for the United States also impedes progress.

52.   The forearm checking rule will prohibit a defensive player from using his forearm to impede the progress of an offensive player who is facing the basket.

53.   The report said social conditions often impeded the progress of women.

54.   The troop progress was largely impeded by mines planted in buildings, the military said.

55.   U.S. Defense Secretary William Perry told reporters in Washington on Thursday that the helicopter dispute would not impede progress on the nuclear issue.

56.   He said the attack showed once again that the enemies of the peace process had not given up on impeding its progress.

57.   Clinton said the decommissioning issue had to be resolved, but it should not impede progress on other issues such as the governance of Northern Ireland.

58.   Negotiations on a final peace settlement are due to start in March, but the issue of Jerusalem threatens to overshadow and potentially impede progress in other areas.