That looks like IR, and will eventually go away, assuming you stop watching CNN. I had some persistent IR when I owned an ST30, but after I stopped viewing what was giving me the IR, it went away eventually. Some things took months, but it DID go away. Fro example: Playing Call of Duty: Black Ops. The C4 icon remained on my screen for a few months after I stopped playing the game. It could only be seen on a few dominant colors, like certain shades of green and gray.
Don't worry too much. Some of it is persistent, but given enough time and use, it will go away.
I had some red and blue Ir that looked a lot like burn in when i played castlevania Harmony of Despair (I basically had like 1000 hours on this game, so it was some extreme plasma abuse for static colors to remain (health bars).
That too was persistent, and went away after a few months of not playing the game.
The more you use your TV without the things causing IR, the faster it will go away.