An air tanker is a specialized aircraft designed to transport and drop water or fire retardant on wildfires. These planes play a crucial role in firefighting efforts, helping to control and suppress flames from the air. They can refill their tanks from nearby water sources, allowing them to quickly return to the fire scene. Air tankers come in various sizes and types, including modified commercial jets and military aircraft. They are often used in conjunction with ground crews and other firefighting resources, such as helicopters and fire engines, to effectively manage and extinguish wildfires.