Once up in the air, flight attendants will usually serve drinks and/or food to passengers. When not performing customer service duties, flight attendants must periodically conduct cabin checks and listen for any unusual noises or situations. Checks must also be done on the lavatory to ensure the smoke detector hasn't been deactivated and to restock supplies as needed. Regular cockpit checks must be done to ensure the pilot's health and safety. They must also respond to call lights dealing with special requests. During turbulence, flight attendants must ensure the cabin is secure. Prior to landing all loose items, trays and rubbish must be collected and secured along with service and galley equipment. All hot liquids must be disposed of. A final cabin check must then be completed prior to landing. It is vital that flight attendants remain aware as the majority of emergencies occur during takeoff and landing. Upon landing, flight attendants must remain stationed at exits and monitor the airplane and cabin as passengers disembark the plane. They also assist any special needs passengers and small children off the airplane and escort children, while following the proper paperwork and ID process to escort them to the designated person picking them up.