PARIS (AP) — The Eiffel Tower and the Louvre museum in Paris will be closed on Saturday as French authorities tighten security to prevent another outbreak of violence following three weeks of anti-government protests.And at the height of the festive shopping season, many retailers have said they will remain shut for the day for fear they may be in the line of any unrest between protesters and police.In addition to the 8,000 police forces that will be deployed in the [...]