 about the expedition. And York, the enslaved manservant who goes along, was perhaps the only member of the expedition who knew how to swim, which you would think would have been a prerequisite for going on a little canoe trip, but it was not. So today you can still get, and every year there's a different back to these, the Sacagawea gold coins. And each year the back reflects a different sort of prominent moment in the country's Native American history or a prominent Native American person.