Image copyrightReutersPolice plans to fly a camera-equipped drone over New Year's Eve celebrations in New York City were ruined by rain.The NYPD had planned to use a surveillance drone to monitor annual party in Times Square for first time.But police chief Terence Monahan said drone could not be safely deployed because of heavy rain and wind.More than a million people celebrated new year at Times Square event, which went without a hitch.Image copyrightAFPImage caption Thousands of NYPD officers worked on New Year's Eve Image copyrightAFPImage caption Despite rain, party was a success The NYPD had planned to use its camera drone in addition to deploying thousands of street cameras, officers and other security measures.The drone was to be tethered to a building so that it could not fall on to crowd below if something went wrong.At a press event on 28 December, force acknowledged that aircraft might not work well in poor weather conditions.Police used helicopters instead to keep an eye on party from above.The force also deployed "counter-drone technology" to prevent unauthorised aircraft flying over celebration in Times Square.