Russian President Vladimir Putin On Thursday added the Syria crisis to the agenda of the G20 summit in Saint Petersburg, suggesting leaders should discuss it over dinner. \"Some participants have asked me to give the time and possibility to discuss other... very acute topics of international politics, in particular the situation around Syria,\" Putin told the opening plenary session of the summit. \"I suggest we do this during dinner so that we... in the first part can discuss the (economic) problems we had gathered here for and are key for the G20,\" he added.