Unfortunately, many American English speakers will conjugate verbs in the singular for a collective noun like "NASA", so that doesn't sound quite as perfect as it should.
We lean so hard into incorporation that we see it grammatically as an entity, rather than as multiple people behind the entity's mask.
You can't put a period on that (in gramatically-correct English) because it isn't a sentence. You can't have a sentence without a verb. There's no verb here. If you look through a real dictionary you'll also notice that the definitions are not period-terminated sentences, and this is why