HFC-125 is a non-ozone depleting replacement for Halon 1301. The HFC-227ea fire suppression agent was the first non-ozone-depleting replacement for Halon 1301. The tank has a halon firefighting system to automatically extinguish fires in the crew compartment. Miller was injured while depressurizing an unrestrained Halon tank. Halon 1301 is common in total flooding systems. It was originally introduced in 1992 to replace the severely ozone-depleting Halon 1211 (bromochlorodifluoromethane). It is an experimental alternative to Halon 1301 (CBrF) in unoccupied areas. R13B1, Halon 13B1 or BTM, is an organic halide with the chemical formula CBrF. Halon 1301 had been developed by DuPont and the US Army in 1954. The European Union is currently undergoing a similar mandated removal of installed Halon systems. Nitrogen systems take up about twice as much space as a comparable halon unit. Within seconds the halon gas had displaced all breathable air from the compartment. Germany uses this system as a replacement for its halon system. The Halon gas can be dangerous to the crew. In 1999, Rita released "Tiftakh Halon" (Open a Window), followed by "Hamtzan" (oxygen) in 2003.