Sen. Daniel Akaka is raising concerns about the country’s “alarming” vulnerability to nuclear terrorism, The New York Times reported on Wednesday.

“We must strengthen domestic radiological security requirements to prevent unauthorized access to these materials,” the newspaper reported Akaka as having said in a statement. 

His comments came ahead of a Wednesday hearing about how Congressional auditors found little to know security around radioactive materials at some hospitals despite a decade-old campaign to keep such materials from getting into terrorists’ hands.

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