The individuals working in ground duty branch are often known as ground crew or Ground Staff. They work at airports to keep airplanes running efficiently. From welcoming passengers to an aircrafts take-off, airport ground staff and air operations personnel play a crucial role in areas such as commercial activities, airline operations and the running of airports. The job of ground staff is vast and varied. Some ground staff work directly with the aircraft, cleaning it inside and out between flights. These people must make sure the ramps, runways and surrounding areas do not have any garbage or debris present that could cause damage to the plane. Ground staff also includes technicians and maintenance workers that are responsible for making sure the plane is in good working order before takeoff, as well as those tasked with cleaning the cabin between flights.