What's the truth about Islam? Does the media concentrate too much on radicals and not enough on reformers? Sam Harris and Irshad Manji react to a fiery debate on "Real Time with Bill Maher."

Actor Jeremy Renner and director Michael Cuesta tell Brian Stelter about the lessons from their new film "Kill The Messenger."

In the film, Renner plays Gary Webb, who wrote a flawed but substantively true story back in 1996 about connections between the crack cocaine epidemic in the 1980s and the CIA's support for Nicaraguan rebels known as Contras. Webb and his story were attacked by other major media outlets.

Stelter said in his introduction: "Next time there's a big story that breaks - a big political or legal scandal - pay attention to what people say about the reporter or the source who broke the news. Are they trying to discredit the reporter? Turn people against the reporter? Distract from the actual allegations? Are they trying to... kill the messenger?"

CNN senior international correspondent Arwa Damon describes the difficult media environment for reporters covering ISIS in Iraq and Syria.

"For us, as Westerners, right now, crossing into ISIS territory, it just simply is not a viable option," Damon said.

A recently-published list of ISIS "rules" for journalists in the region applies to local journalists.

"Six months ago, before these rules even came out, people weren't even allowed to take cell phone video of areas that ISIS controlled," Damon said. "You couldn't even stand in the streets and take a selfie. Your phone would be confiscated."

Allowing local journalists to film and report - albeit under ISIS control and censorship - is a change, and suggests a new level of sophistication.

The treatment of local journalists "is all governed by this overarching sense of fear," Damon said. "At the end of the day, we're not really talking about a free media, even if these local journalists are able to obtain these various permissions. No one is going to risk angering an entity like the so-called Islamic State."