The Country We've Become: U.S Reportedly Bars Entry To Critic Of NSA Surveillance Programs
Jonathan Turley blogs that the European press is reporting that German-Bulgarian author Ilija Trojanow was barred from entering the United States this week:

A critic of NSA spying programs and professor at The European Graduate School, Trojanow was invited to speak at a literary conference and is well-known for his criticism of the surveillance state. He said that he was given no explanation for being barred from entry.

...Germans are outraged and I do not understand why this is not a bigger story in the United States. This is a leading civil libertarian critic of our spy agencies. His being barred entry raises a serious question of retaliation against the critics of our government. He has invited the government to explain his being barred entry. I, for one, would like to hear it. If he is a secret spy, drug dealer or terrorist, it will come as a great surprise. Indeed, we generally arrest such people, not send them on their way. The burden is on the Administration to explain such an action taken against one of its most prominent critics.

From the second link, to dw.de:

A spokeswoman for Trojanow's publisher said he was on the on way back to Germany on Tuesday, the news agency DPA reported.

Zeh and Trojanow co-authored a 2009 book in German: "Attack on Freedom: Security Paranoia, the Surveillance State and the Dismantling of Civil Rights."