If I remember correctly, this is what I did: In settings on the iPhone, I went to either the News app setting or the Notifications setting and turned on notifications for the News app. And then within the News app on the iPhone, I clicked on Favorites on the bottom of the screen, then clicked on the Alert Bell in the upper left corner, then turned the switch for CNN on. I guess you have to make sure CNN is in your favorites in the News app if it is not already there. And in the watch app on the iPhone, I made sure the notifications for both CNN and News app were set to mirror iPhone alerts. I might have forgotten something, but that is pretty close to what I did if not exactly what I did. Hope that works for you.
Also, as an alternative, I noticed the AP News app works the way CNN used to work with breaking news alerts and it is much more reliable with better watch abstracts of the news stories than CNN. I think I actually like the AP News app better.
[doublepost=1481274625][/doublepost]Oh, and in answer to your 2nd question, there is no good solution as far as I know but here is somewhat of a workaround if you want to just live on vibrate mode: turn on the mute switch on either the watch glance or on the iPhone and this will turn off all sound alerts but keep the vibrate alerts. You can also turn on Do Not Disturb, but set it to allow certain people to ring through.....this will silence all alert sounds and vibrations but ring when somebody you know calls. Other than that, I guess we have to wait for Apple or the apps to build in some sort of setting to turn on and off sound alerts for specific apps.