The Drug Enforcement Administration is expected to announce today that it will continue to classify marijuana as a "Schedule I" drug, right up there alongside heroin, acid, and bath salts.
According to the Washington Post, the agency's decision to keep marijuana Schedule I is due in part to the FDA, who recently concluded that there still isn't enough scientific data to prove the drug is safe for medical use. Until then, pot will remain in the class of drugs with "a lack of accepted safety for use under medical supervision, and a high potential for abuse"—at least as far as the feds are concerned.
While the government might be dragging its feet on total legalization, it has decided to give the green light to a number of universities to grow weed in order to study its medical effects. Currently the University of Mississippi is the only college campus federally allowed to grow the drug, but that will likely change with the updated policy.