. >> and as "today in the bay's" kris palone shows us, it sent stocks plunging yesterday as investors worried that everything from cars to appliances will end up costing more. >> reporter: it's a blow to countries that send steel and aluminum to the united states, the president following through on a campaign pledge to impose punishing new tariffs. >> 25% for steel, it will be 10% for aluminum. it will be for a long period of time. >> reporter: the move designed to make prices for american steel and aluminum more competitive with countries that produce them cheaper. industry leaders say it will grow domestic steel production and add jobs. >> i believe that we have to stop the bleeding that the domestic steel industry that is experienced for quite a while now? er it could make cars and washing machines for expensive. >> the winners here are steel companies in the united states who sell steel, the losers are any company that buys steel and that means they're going to pass those costs on to their customers. >> reporter: the u.s. buys more steel than it makes and while the president's wor