> Were a Lockheed Martin worker to send the plans for the F-35 to China, they'd be put in prison.

Not for speech. Let's say that employee worked on those documents, and was presumed to have knowledge that would enable her to recreate similar plans.

Now suppose they defect to China. They could lose their clearance and, I suppose, be prosecuted for misreporting travel plans and foreign contacts.

But what prior restraint can legally be placed on this person?