Standing outside of a Sacramento medical cannabis dispensary, you might detect something in the air. No, it's not secondhand THC vapor — public medicating is prohibited in the county. What you sense is a shift in perspective. Public pressure is building for the legalization and regulation of one of the oldest cash crops in America: the plants of genus Cannabis. The US federal government has held since 1970 that cannabis is a danger to public health and safety and listed the annual flowering herb under US code as having "high potential for abuse" and "no accepted medical potential." "A lot of people are thinking that federal drug laws are arbitrary and now we're starting to see the transl