Dec. 31 (UPI) -- Large protests and unsophisticated lone-wolf acts of violence are the top concerns for law enforcement officials as more than a million people are expected to jam Times Square in Manhattan for the annual New Year's Eve ball drop. New York City Police and Homeland Security said while there are no known specific threats to the celebration, which is also watched live by millions more on television, the ongoing geopolitical climate will have them on alert. Advertisement Homeland