The lesson for journalists is that this isn't journalism, and the first clue is that it didn't come from a journalistic source. Listeners should have found that suspicious from the get-go... and so should Glass.
TAL screwed up. And the worst part is it fits a narrative in which NPR is a propaganda source, which is eagerly gobbled up by people who themselves are being uncritical.
That Fox News piece actually understates how big of a screw-up this was. The key quote that supposedly showed Trump Jr claiming his dad's possible real estate deal in Russia had faded away by 2016, the one that was supposedly contradicted by Cohen's court testimony about ongoing negotiations, was in response to questioning about any possible deals other than the one Cohen was involved in - and in particular one specific potential deal with a different group of people. It's not just that it was brought up elsewhere in other answers that NPR missed. Merely looking at the immediate context of that key quote, the most basic thing we should expect of old-fashioned fact checking, should've been enough to flag the problem. The fact those other negotiations had in fact been brought up was literally the whole basis for that line of questioning.
I'm happy to be more conscious, but someone is working against the scheme: I don't have a real choice...