A US Navy veteran who suffers the effects of posttraumatic stress and a woman who fights cancer became the first people to acquire medical marijuana in Louisiana on Tuesday, as the state became the first in the south to dispense therapeutic cannabis, four years after state legislators approved access to the product.Nine pharmacies are licensed to dispense medical marijuana throughout Louisiana.Louisiana joins more than 30 states that allow medical marijuana. And although marijuana is banned at the federal level, an amendment by Congress prevents the Department of...