There’s a good chance that the car you’re driving is made from American steel.
Steel comes from iron ore, and American car companies rely almost exclusively on the kind that’s mined in Minnesota and Michigan called taconite. It’s carried down the Great Lakes in 1,000-foot-long iron boats to the steel mills.
That supply chain relies on a critical piece of infrastructure at Sault Ste. Marie, Michigan: the Soo Locks.
If there was a major problem there, the effects could send the entire nation into recession. And that has advocates saying it’s time to build a new lock – but they’ve been saying that for decades.