Story highlights Henry Rousso detained in Houston for ten hours

Academic has been traveling to US for 30 years

New York (CNN) A French Holocaust historian who was detained for 10 hours at Houston's George Bush Intercontinental Airport says "The United States seems no longer quite the United States."

Henry Rousso was due to take part in a discussion "Writing in dark times" at Texas A&M University when he was stopped last week.

He says it was the first time in 30 years of traveling to the US that he experienced any problems on entry.

Ruosso says an immigration officer told him he wasn't "allowed to give a lecture and receive an honorarium" with his tourist visa. The US State Department allows foreign nationals to receive an honorarium under a tourist visa if they are a lecturer or a speaker and under certain guidelines, all of which Rousso met.

I confirm. I have been detained 10 hours at Houston Itl Airport about to be deported. The officer who arrested me was "inexperienced" https://t.co/SdIKWKQbnr — Henry Rousso (@Henry_Rousso) February 26, 2017

'Shaken' and 'disturbed'

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