Fire extinguisher had been developed by DuPont and the US Army in 1954. Both 1211 and 1301 work by inhibiting the chain reaction of the fire, and in the case of Halon 1211, cooling class A fuels as well. Halon is still in use today but is falling out of favor for many uses due to its environmental impact. Europe and Australia have severely restricted its use, since the Montreal Protocol of 1987. Less severe restrictions have been implemented in the United States, the Middle East, and Asia. Internationally there are several accepted classification methods for hand-held fire extinguisher. Each classification is
Fire engine ones which can be found in a fire extinguisher. These features give the airport crash tenders a capability to reach an airplane rapidly, and rapidly extinguish large fires with jet fuel involved. Other fire apparatus include: In some communities a fire apparatus, often a paramedic engine, will be used to carry first responder firefighters, paramedics or EMTs to medical emergencies because of their faster response times due to forward staging in the city. Fire departments may also have lifeguards in places such as Los Angeles County, California. The design and construction of fire engines focuses greatly on the use of