Call 911 is an emergency telephone number that can be used to contact emergency services in the United States. It is important to call 911 if you hear shots being fired, as this could indicate a dangerous situation. When you call 911, you should be prepared to provide the operator with information about your location, the type of emergency, and any other relevant details. It is important to remain calm and provide as much information as possible. Calling 911 in an emergency can help ensure that help arrives quickly and safely.