This, from a press release from Regnery:

Washington, D.C.—In a correction and apology broadcast yesterday, National Public Radio admitted that it falsely accused Mark Levin, author of the New York Times bestseller, Men in Black: How the Supreme Court is Destroying America (Regnery 2005) of advocating violence against judges in a recent broadcast of the NPR program, “Day to Day.”
“We have a correction [that] concerns a conversation we aired on April 5 about denunciations of the judiciary by certain conservatives in the wake of the Terry Schiavo case. After noting that a U.S. senator had explicitly linked violence against judges to judicial activism, we then turned to a critique of a book by Mark Levin, called Men in Black. We want to make clear that Mr. Levin’s book does not discuss either violence against judges or the Terry Schiavo case, and we regret any error or confusion that resulted from our story that day.”