I think? Took my asvab (got an 88), finished my physical, and failed the D-LAb (86 ) I wanted to do Missile And Space Systems Maintenance Apprentice, Munitions Systems Apprentice or Nuclear Weapons Apprentice but I failed part B on the depth perception test Can someone crosstrain into those fields? When can you crosstrain? The main reason I wanted to join the airforce was to play with bombs Also, I've been looking into more electronic jobs on www.airforce.com and lots of them seem to interest me a bit. Is it too late to add a job (or several jobs)?