The findings of their "investigation" are really the only reasonable outcome that anyone could expect, and the recommendations are appropriate (pasted below). There was no way there would be evidence to show racist intent, unless they had a history of such nonsense on social media. So essentially, everything we had been discussing about this case is still correct, the kids here were being immature and ignorant and need to be educated on proper behavior.
I put "investigation" in quotes in the paragraph above because this investigation was really only conducted for PR purposes. Since we all know there would be no way to prove intent in this case (and honestly no one ever, ever admits to being racist), an actual investigation was essentially unnecessary. The recommendations are reasonable and would have been the same even if they handled it all informally and internally.
Listen kids, try to not be an idiot on TV. Even if you do something that unintentionally might be viewed as racist, you can find yourself in the center of some ugliness you don't want to be a part of. Especially if you are a military cadet, try to act in public with a little bit of dignity and class.