Remote spying and bombing in USA

I thought that drone bombing would take place only outside of the US, but that may change after all: "Drone aircraft may prowl U.S. skies." So the U.S. is trying to gain permission to prosecute, judge and execute -- OK the missles may not be allowed at first but what's to stop them for bolting on the missiles? -- remotely with a push of a button even here in the U.S.