“51 is a very important number” reference on Weaponized and Need to Know

On yesterday’s episode of “Need to Know” and “Weaponized” both hosts began their episodes being sly about 51 being a “very important number”. I’m assuming this is just a Area 51 joke? They seemed like they were implying some other significance to it. I’ve usually pretty on top of the topic. Maybe I’m just reading to far into it.