by Frida Ghitis, Sentinel Source, USA - A startling chant rose from the crowd in the latest round of anti-government protests in Iran. The tens of thousands who took to the streets a few days ago, risking imprisonment or worse by defying the regime, cried out in their native Farsi, but in the cellphone videos sent around the world one can easily make out one word echoing inside a puzzling sentence: “Obama, Obama!”