Defiant Khamenei insists 'won't back down' in face of Iran protests

Chanting slogans including "death to the dictator" and setting fire to official buildings, crowds of people opposed to the clerical establishment marched through major cities late Thursday. Internet monitor Netblocks said authorities had imposed a total connectivity blackout late Thursday and added early Friday that the country has "now been offline for 12 hours... in an attempt to suppress sweeping protests". The demonstrations represent one of the biggest challenges yet to the Islamic republic...