Angry demonstrations against an anti-Islam film spread to their widest extent yet around the Middle East and other Muslim countries on Friday. Protesters smashed into the German Embassy in the Sudanese capital and set part of it on fire, and climbed the walls of the US embassy in Tunis. Investigative journalist Gareth Porter talks to RT. He says the series of attacks on US embassies across Arab world should be a wake-up call — a red light flashing – for the national security elite in the US.