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.
Some Minecraft blocks. Blocks are a type of item in Minecraft. They make up the in-game environments, and they can be collected and utilized in different ways. Some blocks spawn naturally, such as Dirt or Stone, while others, such as Bricks or Redstone Lamps, must be crafted by the player.