this is a web site that shows how some people say that if the DADT policy is eliminated or even replaced by the MREA they would not even think twice about rejoining he armed forces.
This website is an inherent barrier for the NASA plan because the Treaty of 1976 bans the government or anybody else for that matter to bring nuclear weapons, or any weapons into outer space. In order to blow up Apophis, we would have to do so, therefore the Outer Space Treaty of 1976 would be what is currently blocking the space plan from being in act.