BEIRUT – Hundreds of thousands thronged public squares in the capital and across Lebanon on Sunday in the largest protests the country has seen since 2005, unifying an often divided public in revolt against traditional leaders who have ruled for three decades and brought the economy to the brink of disaster. Ditching party flags and carrying only white and red Lebanese flags with a cedar tree in the center, they flooded streets in Beirut, the northern city of Tripoli, in eastern Baalbek as well as cities, towns and villages near the southern border with Israel and along Syria's border in the east. In downtown Beirut, the scene was reminiscent of the days after Prime Minister Rafik Hariri was assassinated by a massive bombing in 2005, triggering a mass uprising against Syria's occupation of Lebanon after Damascus was blamed for the killing.