US President Barack Obama has said failing to prepare for the aftermath of the ousting of Libyan leader Col Muammar Gaddafi was the worst mistake of his presidency.
Mr Obama was answering a series of questions on the highs and lows of his time in office on Fox News.
He said, however, that intervening in Libya had been "the right thing to do".
The US and other countries carried out strikes designed to protect civilians during the 2011 uprising.
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