I am a fan of Sam Harris' podcast. Not only are his interviews superb, but as one of America's leading atheists, it is good to know what the other side is saying.
Speaking of hearing what the other side is saying, Sam Harris recently had "The Very Bad Wizards" on his show. See #92. While talking about the limits of persuasion, Tamler Sommers asked Sam Harris to expound upon the notion of moral certainty. He found Harris' strength of conviction surprising. As a kind of test case, or example, Sommers asked if something like abortion is a moral certainty in Harris' mind.
The answer and ensuing dialogue is well worth your time.
Begin at 1:19:04.