Absolute zero is the basis for the Kelvin scale, which defines 0 K as absolute zero. Created in 1848 by William Thomson, also known as Lord Kelvin, this temperature scale remains the predominant scale used in thermodynamic chemistry and physics.
Esprit de corps is defined as the pride and honor shared by the members of a group. An example of esprit de corps is a group marching to bring awareness to a current issue. group spirit; sense of pride, honor, etc. shared by those in the same group or undertaking. Origin of esprit de corps.
It's like how the Marine Corps motto (Semper Fidelis or Always Faithful) is to give you something to think about other than how much more attractive dying is after being in the Marine Corps. The Air Force wants its people to think about the exciting part of the Air Force, not the 99.9% of the Air Force. It references flying, which is cool. It references fighting and winning, which is really cool. Aiming is kind of cool. Being high is cool.