The idea of western powers providing arms to Syrian Rebels fighting the government of President Bashar al-Assad is running up against opposition at home and abroad.

UK Prime Minister David Cameron met with Russian President Vladimir Putin at No. 10, but the two came to no agreement over how to bring an end to Syria's increasingly bloody civil war.  Cameron has also expressed interest in arming the rebels.  His deputy PM Nick Clegg has voiced doubts.

Putin did not directly mention the US decision to provide unspecified aid to the rebels, but he derided the nature of the rebels themselves.

Putin rhetorically asked, “You will not deny that one does not really need to support the people who not only kill their enemies, but open up their bodies, eat their organs in front of the public and cameras. Are these the people you want to support?”  He was referring to the infamous video of a Syrian rebel eating the heart of a fallen government soldier.

Meanwhile, President Obama will likely run into congressional opposition to arming the rebels.  The chairman of the House of Representatives Intelligence Committee says the White House will have to be specific about plans and goals.

And Canada says, “no”.  Prime Minister Stephen Harper says his government will not take part in sending weapons to the rebels, even though his foreign minister announced his approval of the US plan.