"What do you want to happen as a result of your understanding of the JFK [assassination] story? What, if anything, does it require the American government to do in 2014?"
Unfortunately, "the government" cannot and will not do anything regarding the Kennedy / King / Malcolm X assassinations, because the legitimacy of the United States government is held hostage to the truth.
There will, of course, never be a grand reveal of the truth that strips away the fog of amnesia from the minds of the American public. This will not be allowed. While there may be startling revelations at some point in the future, they will be stage-managed by the mental manipulators, such that their effect on the perceptions of the public will be minimized, if not entirely negated. The Emperor's nudity must never be allowed to be revealed.
We already know, with little doubt, of the complicity and outright authorship of activities by United States government security agencies such as the FBI and CIA, in COINTELPRO-like programs to discredit the reputations of public figures, internationally and domestically. It is only a tiny step from disinformation (lying) and propaganda to averting the official eyes from more active interference, and yet a smaller step, once on the path, to participation. The result of the officially sanctioned oppression of the 60s is the prevailing surveillance state we experience in today's enemy-deficient world, where Terrorism has replaced Communism as justification for the recision of Constitutionally guaranteed civil rights.
One can hope that if documentation of government complicity in the 60s assassinations were to be globally distributed, say, by a WikiLeaks type action, such widespread opening of the collective eye would indeed destroy the legitimacy of the United States government sufficiently to cause its downfall and replacement by a democratic parliamentary form of government. This would, unfortunately, require a degree of public participation in the process of government now sadly lacking. But let us not discount the ability of the American people to rise to an occasion when sufficiently motivated. We are long past due our responsibility to "water the tree of Liberty with the blood of tyrants."
Unless and until the documented truth is revealed, there is nothing the government need do, and nothing the awake and aware public can do about our ineluctably corrupt government. The corporate oligarchy controls access to information, inescapably surveils the public for signs of unrest and incipient rebellion, creates and maintains an atmosphere of fear of fictive external enemies, and maintains a monopoly of force against any potential or actual uprising.
In Oliver Stone's words, as Jim Garrison in his 1991 film, JFK:
It may become a generational affair, with questions passed down from father to son, mother to daughter, in the manner of the ancient runic bards. Someday somewhere, someone might find out the damned Truth. Or we might just build ourselves a new Government like the Declaration of Independence says we should do when the old one ain't working. An American naturalist wrote, "a patriot must always be ready to defend his country against its government."
That "American naturalist" was Edward Paul Abbey, author of Desert Solitaire, Fire on the Mountain, and The Monkey Wrench Gang, anarchist, gadlfy, curmudgeon, and inspiration to a generation of patriots who continue to defend this country, and its natural habitats and species, from an overweening government.
There's plenty of work to do and time is on our side.