Military action has begun in Libya, with France leading the way. A French plane is reported  to have fired on a Libyan military vehicle in the first air strike of the campaign. As many as 20 of the country's fighter jets are patrolling the skies over Benghazi in an attempt to enforce the no-fly zone.
In a typically assured statement outside the emergency conference in Paris, Nicolas Sarkozy has declared that "France has decided to take up its role in front of history". David Cameron has conceded that there will be "unforeseeable consequences" of taking action, but has insisted, Blair-like, that it is better to intervene than to "risk the consequences of inaction".
He said: "Colonel Gaddafi has made this happen. He has lied to the international community, he has promised a ceasefire, he has broken that ceasefire. He continues to brutalise his own people and so the time for action has come. It needs to be urgent. We have to enforce the will of the United Nations and we cannot allow the slaughter of civilians to continue.
"What is absolutely clear is that Gaddafi has broken his word, he has broken confidence and continues to slaughter his own civilians. This has to stop. We have to make him stop and make him face the consequences. I think action must take place urgently."
For now, the declared aim remains to protect the people of Libya; both Cameron and Sarkozy have been careful not to give voice to the ultimate objective of regime change. It remains unclear how the allies will respond if Gaddafi refuses to give way. Meanwhile, there are reports that the rebels have admitted that they shot down  their own plane this morning.
UPDATE: French fighter jets have destroyed four Libyan tanks in air strikes to the south-west of Benghazi, according to al-Jazeera.