Republican presidential candidate Mitt Romney delivers the commencement address to the graduating class of Liberty University, the world's largest Christian university, telling them that marriage is between "one man and one woman".

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The Lynchburg, Virginia, school, founded by the late television evangelist Jerry Falwell, is a bastion for conservative Christian thought. Its theology students are taught that Mormonism - Mr Romney's religion - is a cult.

But Mr Romney seized the opportunity to try to show evangelicals that he and they have much in common, and carefully avoided talking about his own faith. Instead, Mr Romney appealed to the "free exercise of religious faith" as a cherished American value.

"Perhaps religious conscience upsets the designs of those who feel that the highest wisdom and authority comes from government," said Mr Romney. "But from the beginning, this nation has trusted in God, not man."

Here's a link to the full transcript of Romney's speech, and here's a link to a video of the full commencement address.