Iran's government celebrated the popular uprisings first in Tunisia, then in Egypt, Bahrain and Yemen. But when protests began in Syria, Iran turned uneasy and uncertain.
Syria is one of Iran's few real allies in the Arab Middle East, and Tehran has carefully cultivated a relationship with the ruling Assad family for more than 30 years.
If Syria's President Bashar Assad falls, Iran can no longer count on Syria. And among other benefits, the Syrian connection is crucial for Iran's relationship with Hezbollah in Lebanon.