My son is 18 and is set on joining the Marines. He's uncertain about whether he will join as a trainee officer or a Comando. It worries me sick. I am trying really hard not to let it get me down but I keep on having scary thoughts about the possibilities of him being injured or killed. I know that there's not much I can do to dissuade him so I think I am going to have to live with these fears. Has anyone else experienced this?