The Defence Safety Authority (DSA) is an agency of the United Kingdom Ministry of Defence which regulates safety and investigates accidents in the UK's Armed Forces. The DSA was launched on 1 April 2015 and brings together the Defence Safety and Environment Authority (DSEA), Military Aviation Authority (MAA) and Defence Fire Safety Regulator (DFSR), to form a single common managed organization under the leadership of a 3-star Director General (DG) – DG DSA. The Director-General is also the head of the Defence Accident Investigation Branch (DAIB) (Formerly the Military Air Accident Investigation Branch (MilAAIB) and the Land Accident Investigation Team (LAIT)).