Sorry to be That Guy, but sentences are not delimited by periods, they’re delimited by the presence of a verb in an active clause. So Today In One Sentence is actually many sentences, that just happen to have semicolons in between them.
Is this a disastrous detraction to the quality or value of WTFJHT? No, of course it isn’t. But, maybe deciding on the one and only one thing that’s the single most important point about what happened Today would be an interesting thing to do.
In other words, of the four or five things that are normally flagged in Today In One Sentence, what is the most important one of all? That would be Today In One Sentence.