During World War II, Mayo Clinic offered its services to the government for $1 per year through its aero medical research unit. Mayo's research led to pioneering advances in aviation medicine. As part of its research unit, the anti-blackout suit -- "G" suit -- was developed. A modified version of the original "G" suit is worn today by military pilots.

The research unit at Mayo has had an important influence on commercial and military aviation as well as the space program. The unit originated the Mayo-1 or M-1 maneuver. This self-protective technique increases pressure around the heart so it can pump more blood to the head.

A "G" suit and M-1 maneuver saved countless lives and gave the Allies an advantage in the war. This aero medical research has led to advances in patient care at Mayo, including methods and instruments for heart catheterization.

See videos related to the G suit and M-1 maneuver, as well as Mayo's solution for the challenge of parachuting from high altitudes.