In many aspects of "public" opinion formation and manipulation, governance, military applications, taxation policies, public school curricula, etc., America has already become a totalitarian tyranny, or 'ZOG' for want of better shorthand descriptive.
But no one can point to a specific date, like the black day the Orwellian "Patriot Act" was enacted, the stygian Waco Day of Incineration, the Day of the Ruby Ridge Murders, the day weaponized anthrax was released by ZOG's operatives a week after the false flag op called '9/11", and really say: "Aha, this is the day we became serfs of a terrible ZOG!" ZOG is an ongoing and ever-pervasive tyranny, which like the astrophysical phenomenon of a black hole, comes to inexhorably suck everything into its power, first by distorting the target and then swallowing it up.
ZOG came ever so gradually, patiently, and like a terrible mutated virus, rather skillfully adapted itself to changing conditions. In retrospect, yes, we can see that American involvement in WWI, the institution of the federal income tax, the spawning of the Federal Reserve syndicate, all nearly a century ago, were big steps on ZOG's path .... but it was always the little steps that smoothed the path ..... well, here are three of them for you right from todays news:
1. The FBI's stasi network continues to grow: http://www.npr.org/2011/08/21/139836...rmants?sc=emaf
2. The NYPD has now admitted that active duty CIA personnel are now formally embedded within it: http://abcnews.go.com/Politics/wireStory?id=14379253
3. The CIA has excised, from an intended publication, information which was provided in public testimony: http://www.npr.org/2011/08/21/139836...rmants?sc=emaf
Like the fog Carl Sandburg once wrote about, tyranny comes little by little, on little cats' feet.