MURPHY, Circuit Judge. The Black Lung Benefits Act authorizes benefits for coal miners who have “pneumoconiosis.” The Department of Labor’s regulatory definition of this term covers an obstructive lung disease such as emphysema if the disease arises from coal-mine work. Over two decades ago, the Department responded to criticisms of this broad definition in a regulatory “preamble” to its final regulation. The preamble interpreted the then-existing scientific studies to establish that coal-mine work can cause obstructive diseases, either alone or in combination with smoking. The administrative law judge who awarded benefits in this case repeatedly relied on this preamble to discredit a coal-mine operator’s three experts. In this petition for review, the operator argues that the judge wrongly treated the preamble as legally “binding.” We disagree. The judge simply found the preamble more persuasive than the experts. So we deny the operator’s petition for review. But we caution administrative law judges that their conclusions may lack substantial evidence if they over-rely on the preamble for propositions that it does not contain.

SUTTON, Chief Judge. Kathy Griffin, a California-based celebrity and social activist, sent a series of tweets to her two million Twitter followers asserting that Tennessean Samuel Johnson, the CEO of Tennessee-based VisuWell, had engaged in homophobic conduct. She encouraged her followers to make him “online famous” and tagged his company. She then asked his employer to “remove[]” him from the Board of Directors and threatened that the “nation w[ould] remain vigilant” if it did not. Within a day of her first tweets, the company fired Johnson and removed him from the Board. Johnson and his wife sued Griffin in federal court in Tennessee, claiming (among other things) that she tortiously interfered with his employment. Griffin argued that her tweets did not subject her to the State’s personal jurisdiction, and the district court dismissed the case. We disagree and reverse.