"But geez. He could be making all this up, and who would ever know? When did unknown sources become gospel in the news?"

I think it is reasonable that US Miltary is considering using nuclear bunkerbusters on Iran nuclear production sites. It needs to determine whether bombing Iran will result in delaying Iran ambition to get nuclear weapons. One should propose using conventional means and compare it to using nuclear bunkerbuster. The debate or disagreement is over whether these nuclear bunkerbuster should be given as an optional plan. I think this should be a decision for President to make and therefore a plan including nuke bunkerbuster should be included.
Whether *any* type bombing raid take place in the near future is uncertain, though what is a certainty is that if Iran follows international law there will be no bombing.