A governor may issue a warning of a credible threat of terrorists.
A credible threat can be constituted-of-or-filled-with terrorists.
A government may receive credible threats of (terror attacks).
Credible threats can be constituted-of-or-filled-with attacks.
Credible threats can be constituted-of-or-filled-with retaliation.
A credible threat of lawsuits may ensure that something-is-the-case.