Barack Obama and David Cameron have said Col Gaddafi will ultimately be forced out of power and Libya's people allowed to "choose their own future".
At a joint press conference in London, the UK prime minister vowed to "turn up the heat" on the regime in Tripoli amid suggestions of deadlock on the ground.
But the US President urged people to be "patient", saying the allied campaign in Libya would be "slow and steady".
http://www.bbc.co.uk/news/uk-politics-13533306
Note: Update record, 25 May 2011 Last updated at 13:44 GMT