But only God knows the truth, the whole truth, and nothing but the truth. Knowing the full truth requires omniscience.

Everyone else -- even with the most noble intentions -- is only telling you the part of the truth that they know and that they have selected as important to communicate to you. Also, some of the things they believe to be true, are not true, or are no longer true. And, sometimes, their communication is not effective, so they think they are telling you one thing, but you receive some other message.

The news is no exception to this rule, so there can be no news source with 100% truth, and you wouldn't understand it, even if there were.