Billboards, signs and posters remain an important way for business owners to advertise their goods and services. But in many cities across the United States, some of these signs are not stuck in the grass or hung up on a wall - they are in constant motion thanks to sign spinners. People spin signs of all shapes and sizes, in all directions, to attract the attention of both pedestrians and car drivers. VOA's Faiza Elmasry reports. Faith Lapidus narrates.