If you commission in to the Air Force as a non-rated officer (not a pilot, navigator, air battle manager) you'll be required to serve 4 years active duty. Pilots are required to serve 10 years. Basically it would be 8 years active (2ish years for flight school, 6 years actually flying) then 2 years inactive........
Stumbling block. For other uses, see Stumbling block (disambiguation). A stumbling block or scandal in the Bible is a metaphor for a behavior or attitude that leads another to sin.
(blÅk) n. 1. a. A solid piece of a hard substance, such as wood, having one or more flat sides. b. Such a piece used as a construction member or as a support. c. Such a piece upon which chopping or cutting is done: a butcher's block. d. Such a piece upon which persons are beheaded.