Protests Smaller but Still Alive in Iran

It appears that at least 20 demonstrators were killed Saturday on the streets of Iran in clashes with police and militias in civilian clothes. After a quieter Sunday, protesters in Tehran faced police and militia again today. Their numbers were much reduced, but there's no doubt that dissention runs deep and wide, including a split among clerics in Iran's ruling elite. We update today's developments, assess the strength of the regime, and find out how other countries are responding. Should President Obama give the protesters solid US support, or would that threaten their legitimacy and even endanger their lives?