President Trump threatened to "take very strong action" if Iranian authorities begin hanging anti-government protesters this week."We will take very strong action. If they do such a thing, we will take very strong action," Mr. Trump told "CBS Evening News" anchor Tony Dokoupil during an exclusive network interview in Dearborn, Michigan, airing Tuesday night. Mr. Trump said he's aware a "pretty substantial number" of people have been killed over the more than two weeks of demonstrations. Sources tell CBS News at least 12,000 — and possibly upwards of 20,000 — are now feared dead, as videos show body bags lined...