(CNN) -  The Syrian army's latest offensive has thwarted U.S.
expectations of a decisive victory by rebels to oust President
Bashar Al Assad.  Now the U.S. must talk to Assad's key ally
Iran in Geneva 2, an international meeting looking to resolve
the Syrian conflict which is scheduled for next month if the
opposition agrees on its representation.  Iran believes that it
holds the key to resolving the Syrian conflict as a credible
broker and other stakeholders must stop ignoring it. Last year,
it was barred by the West from Geneva 1.  Since then, Washington
and the European Union have split with France and the UK over
when to supply heavier arms to rebels.  France and the UK have
suggested that if the Geneva talks fail to secure peace, they
would be willing to arm moderate rebels not opposed to the West
-- but there is no easy way of guaranteeing a rebel group's
loyalties.  Iran says the supply of light arms, which it
believes comes from the U.S. and its allies, must stop to allow
a power transition in Syria i