DMCA is for one. I am not sure for "national security" reasons what options would be. It is definitely challenging to come up with excuses within rules of law.

DMCA is for one. I am not sure for "national security" reasons what options would be. It is definitely challenging to come up with excuses within rules of law. I would imagine that some combinations of failures to meet FCC regulation and "immediate" national security threat probably would do the trick. There is no guarantee that Apple AppStore or Google Play Store won't make a stand and challenge these requests in court though.