Police Operations Crowd Control New Year's Eve Christmas Markets New Year's Eve Celebrations Police Mobilization Police Deployment Police Response Crowd Management New Year's Eve Preparations New Year's Eve Celebration Mahakumbh Mela Traffic Management Police Arrangements Emergency Preparedness Counterterrorism Fan Management Police Actions Carnival Safety Holi and Ramzan Holi Festival Police Monitoring Risk Assessment Police Presence Olympic Security Measures Terror Threats Crowd Control Measures Rally Security Concert Security Crisis Management NYPD New Year's Eve Regulations