11.   The American Automobile Manufacturers Association welcomed the progress made between the U.S. and Korea, but added significant barriers remained.

12.   The political barriers remain formidable for the voucher movement.

13.   The researchers cautioned that what they have created is only the first step toward building molecular computers and that significant barriers remain.

14.   Those barriers remain high because local construction has failed to keep pace with the strong demand for office and apartment space.

15.   To be sure, a few barriers remain before Webcasting can become part of our daily lives.

16.   Two barriers remain before Lindros becomes a Ranger.

17.   Yet, several barriers could remain.

18.   A U.S. official said Friday barriers remained before private companies were ready to take part in a Caspian Sea oil pipeline.

19.   A U.S.-engineered federation between the two peoples forced some of those barriers to come down, but the psychological barriers remain.

20.   Although the barrier remained open afterward, guarded by five Croat policemen, only Muslim women and children and a few elderly men came through.