Have you ever wondered how skyscrapers, cars, and bridges are built? Meet Joe, a professional welder. Welding is the process of joining metals together, and Joe is an expert at it. There are several types of welding, but Joe specializes in two types: arc and MIG welding. Arc welding uses a welding power supply to create an electric arc between an electrode and the base material to melt the metals at the welding point. MIG welding, on the other hand, uses a wire feeding gun that feeds wire at an adjustable speed and flows an inert gas over the weld to protect it from contamination. But welding is not just about joining metals; safety is vital. Joe always wears a protective suit, gloves, and a helmet with a visor. This protects him from harmful ultraviolet and infrared light, metal splatters, and intense heat. At the end of a long day, when Joe sees the objects he has created from separate pieces of metal, he feels a sense of immense satisfaction. From the chair you sit on, to the car your parents drive, the work of welders like Joe affects our daily lives in ways we often don't realize.