Let everyone serve in the military

With the end of Don't Ask Don't Tell, it turns out that there is one group of adolescents and young adults barred from serving in the US military: d/Deaf and disabled. I had no idea that the US barred them and that most countries allowed. I would ask why there is not more awareness, except I know the answer: disabled issues are often invisible. When will disabled rights acquire the same cachet as minority or gay rights?