(ROUGH CUT ONLY - NO REPORTER NARRATION)<br/> <br />Protesters in Tahrir Square set a police pickup truck on fire on Monday (March 18), as unrest continues in the heart of the Egyptian capital.<br/> <br />Witnesses said that the police officer driving the vehicle was released before his truck was captured and set on fire.<br/> <br />Tahrir Square, the focal point of the uprising that toppled Hosni Mubarak, has been mostly closed to traffic for months.<br/> <br />Several police cars have been set on fire in Tahrir Square in recent weeks.<br/> <br />Young protesters man checkpoints around the square, which is near government buildings, including the Interior Ministry.
