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 | |  | | By Hannah Jewell and Jamie Ross | Good morning. It’s Tuesday, July 21, and the National Gallery is marking the nation’s 250th birthday with a revealing exhibit about mining. See some of the images here. Now let’s catch up. | |  | Nearly 100 U.S. troops have been injured in the past two weeks of the Iran war. |  | President Donald Trump said he’ll impose 50% tariffs on Canadian goods in 30 days. | -
Why? Officials cited trade barriers against U.S. products. But the move came after Trump threatened tariffs over wildfire smoke from Canada that drifted into the U.S. last week. -
If the tariffs take effect: Americans would probably be hit with higher prices ahead of November’s midterms. Prices have already soared on many everyday grocery items.  |  | The Democrat set to replace Graham Platner led the Maine Senate with a temper. | | Troy Jackson’s temper was a feature of his six-year leadership over Maine’s Senate. (Robert F. Bukaty/AP) |  | The FDA retracted a test result in the cyclosporiasis outbreak. | -
What happened? A test showing cyclospora contamination in a sample of lettuce from Taylor Farms was a false positive, the agency said. But it still links the company to the outbreak. -
Are you worried about cyclosporiasis? We answered key questions about it here, including whether it’s safe to eat lettuce now and which other products may be at risk.  | Homeownership might be more out of reach than we thought. | -
Americans think homeownership is the norm: The number of U.S. homes occupied by their owner is 65%. But economist Erik Hembre says we are measuring homeownership wrong. -
He says we should count people, not houses: Hembre calculated that only 53% of adults live in a home they own. Young adults living with their parents make up much of the difference.  | Some dementia symptoms can show up years before a diagnosis. | | (Illustration by George Wylesol for The Post) | -
Like what? Sleep problems, slower walking and weaker handgrip strength are among these six lesser-known symptoms that can predate cognitive problems by years. -
Take action: About 45% of dementia cases are preventable with simple lifestyle changes, such as challenging yourself intellectually and cutting out alcohol.  | The Post’s Climate Coach shared the right way to recycle messy peanut butter jars. | | How does your peanut butter make it through the recycling system, and do you really need to scrape it clean? (Elysa Weitala for The Post) | -
Readers kept asking: So Michael Coren found the answer. He says that a quick scrape, not a wash, is all that’s needed. You can use a rubber spatula or even give it to your dog. -
We have the ability to recycle far more than we do: To learn how our recycling system could improve, Coren traced a peanut butter jar’s journey through a modern facility. Before you go ... you shouldn’t let your dog loose on all garbage: Here’s what a vet says to do if your pooch has a trash feast. Plus: An ex-fiancée loved her dog more her partner. Can they still be friends? One more good read: His doctor’s prescription for his unbearable pain seemed absurd. But it worked.  | News quiz: Test your knowledge in today’s On the Record. |  | Word game: One word to spell ’em all! Can you solve today’s Keyword in 6 guesses? |  | Wridges: Speed and spell your way up to a high score in our newest game. | You’re all caught up. See you tomorrow. |  | | ((Illustration by Katty Huertas/The Washington Post)) | |
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