11.   An economic downturn could cause investors to pull their money out of stocks, and lead governments to erect barriers to free trade.

12.   And since local authorities often own stakes in these mini-ventures, they erect protective barriers that hinder progress toward a national auto market.

13.   As the trade imbalance figures get bigger, isolationists will become more determined to erect trade barriers around this country.

14.   Barriers have been erected to direct traffic inside the central terminal area.

15.   Because of the rapid spread of parks in Europe, some communities, most notably in Britain, have begun erecting barriers to further construction.

16.   Barriers were erected against bananas imported from Latin America, while preference was given to fruit produced in former European colonies in Africa and the Caribbean.

17.   A mental barrier has been erected.

18.   Advertisers, publishers and online commerce companies are warning that a proposed European Union law would erect barriers to communicating across borders in the union.

19.   After the trade barriers were erected it turned to the U.S. government for assistance.

20.   But even as politicians have been trying to erect barriers, filmmakers on both sides of the Atlantic have been tearing them down.