Authorities are stepping up security for New Year's Eve celebrations across the U.S. as revelers prepare to welcome 2016 amid widespread nervousness after recent terror attacks in Paris and San Bernardino, Calif.
In America's two largest cities, officials assured the public Wednesday that there were no known credible threats against either New York or Los Angeles ahead of three of the most famous New Year's events on the calendar.
"Leave the worrying to the NYPD," said James O'Neill, chief of the department. "People should feel safest this New Year's Eve because we're there."
About 1 million people are expected to pack the blocks around Times Square Thursday night to watch the 11,875-pound Waterford crystal ball drop, marking the official start of 2016.
At least 6,000 NYPD patrol officers will be assigned to the Times Square festivities, between 600 and 800 more than on New Year's Eve 2014.