Obama told a White House news conference Guantanamo "is not necessary to keep America safe" and actually hurts anti-terror efforts.
"Congress determined they would not let us close it," Obama said.
Obama said he will try to make the case the prison is not in the best interests of the American people.
Obama called it a "no-man's land," saying it's "contrary to who we are."
He called on Americans to reflect on why we're keeping the prison open when other terrorists have successfully been tried in civilian U.S. courts and are being held in federal prisons.
"We can handle this," he said.
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