"Whenever any disturbing news is brought to you, you should have this thought ready at hand: that news never relates to anything that lies within the sphere of choice" (v. 1, p. 175).
News falls under the category of "things outside our control" and therefore, since it is outside our control, the thing can't actually hurt us (mentally - from your hegemonikon's perspective).
Epictetus goes on to elaborate this point through the rest of this chapter.
We should "mind the gap" between stimulus (disturbing news) and our response to it. The more we practice being mindful, the more quickly we are able to determine that news should really not disturb us. Rather, we ought to view all news objectively.