Almost all of the flight attendant's duties are safety-related, though customer service is also important. Approximately one hour before each flight, attendants are briefed by their captain. Weather conditions, possible turbulence, flight duration, and other factors that may affect the upcoming flight are discussed in detail. They are also briefed on safety details and emergency equipment supplies relevant to the aircraft they will be flying. A list of passengers is verified and attendants are notified if any special needs passengers, small children, or VIPs will be boarding the flight.