The NTSB, or National Transportation Safety Board, is an independent U.S. government agency responsible for investigating transportation accidents. This includes incidents involving airplanes, trains, buses, and boats. The NTSB's main goal is to improve safety by determining the causes of accidents and making recommendations to prevent future occurrences. In addition to investigations, the NTSB also conducts safety studies and promotes public awareness about transportation safety issues. Their work helps ensure that travelers can have safer experiences on the road, in the air, and at sea, ultimately saving lives and reducing injuries across the nation.