Tony Blair on Syria: Not to act is 'dangerous'
6 September 2013 Last updated at 09:03 BST
As arguments for and against military action in Syria continue to dominate the G20 summit in St. Petersburg and proceedings on Capitol Hill in Washington, Tony Blair has explained why he believes intervention is necessary.
Mr Blair, Middle East envoy for the quartet of the United Nations, United States, European Union and Russia, said: "It's pretty clear frankly who is responsible for [the chemical attack], and not to act is dangerous.
"You're sending a signal that such a use of chemical weapons can take place, without the international community having a robust, and proper, response."
First broadcast on BBC Radio 4's Today programme on Friday 6 September 2013.
What Syria means for Britain will be broadcast on Monday evening at 20:00 on BBC Radio 4.