1.   A walkout would halt car and truck production as early as next week.

2.   The walkout halted most shipments from Santos, though port warehouses are still being loaded.

3.   The walkout could halt some GM vehicle production as early as tomorrow.

4.   The walkout halted most shipments from Santos.

5.   The spontaneous, one-day walkout halted production of Ford Fiesta models bound for sale in Europe, Latin America and Asia.

6.   The walkout also halted work at many independent suppliers.