Medical marijuana and the feds Debra Saunders If the federal government were right that medical marijuana has no medicinal value, why have so many doctors risked their practices by recommending its use for patients with cancer or AIDS? Marcus Conant, the doctor who identified the first cases of Kaposi's sarcoma among San Francisco AIDS patients, can answer that. Imagine you're the doctor for a 40-year-old lady with breast cancer. They put her on chemotherapy, and every time she takes her therapy, she throws up. She can't sleep; she's up sick all night. She has trouble caring for her children. Medical...