I'm joining th Marines as soon as I get a few things in order. My goal is to go Recon, or Scount sniper. I'm in the physical shape to handle the majority of it, and I am working on the parts that I can't at the moment. My question is about the cross training. From researching online, and talking with people, I've noticed there are a lot of schools that cross train with other military braches, etc. Is there a list of what schools these are, and what qualifications are needed to cross train with them? Thanks in advance.