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Cut and ground to specific tolerances and exact angles , prisms are polished blocks of glass or other transparent materials that can be employed to deflect or deviate a light beam , rotate or invert an image , separate polarization states , or disperse light into its component wavelengths . General Shaud : Given the premise that oversight as compared to insight is needed to assure the cost schedule performance of space systems and minimize related risk , how would you address the resources , manpower dollars , needed to migrate from insight to oversight ? And if you take our active duty force and look at how we use it , you find that about one-third of it does not deploy forward . This must be done precisely and decisively to minimize the loss of territory and / or lives . One of your Boeing mission review recommendations was to invoke a more rigorous risk management process . Here the Air Force was able to deploy more teeth to the fight by leaving more tail at home . So we will deploy with predictive squadrons and provide that capability for the theater CINC in very rapid fashion . Furthermore , joint doctrine still tends to portray aerospace power as principally a supporting element for ground operations . And that puts very large pressure on our families , as we moved people from the CONUS to overseas , and then even deploy them from their overseas location , or separate the families as we deploy forward in our expeditionary mode . We can also capitalize on simulators that exist in industry today , where you do not have to deploy all of those forces .