The Americans say Gaddafi himself isn't a target, but Defence Secretary Liam Fox told 5 live on Sunday night that he could become one.
So, what's the way forward?
Should coalition forces make a surgical strike, and try to kill Gaddafi? Or, should they just be trying to protect Libyan civilians, as per the terms of the UN resolution?
Nicky Campbell asks: Is it time to take Gaddafi out?