Description:Video emerged on Saturday (March 10) of tens of thousands of Bahrainis taking to the streets to demand democratic reforms, stepping up pressure on the U.S.-allied government in the biggest protest yet. The protest which took place on Friday (March 9) started along a highway near Manama after the protesters responded to a call from leading Shi'ite cleric Sheikh Isa Qassim, who urged people to renew their calls for greater democracy.(0:57)