A massive new flood defence system called MOSE, aimed at protecting Venice's lagoon during high tide, was finally installed in October. This week St Mark's Square was again under water, after MOSE did not activate due to human error. Residents, long accustomed to perennial high water events, pulled on their rubber boots once more to deal with flooding that reached a high of 4.5 feet above sea level. Waters drowned the square and invaded the famous basilica as shopkeepers blocked their entrances with wood panels to keep the water out. The MOSE project began in 2003 but was plagued by cost overruns of $6 billion, corruption scandals and delays.