Iowa lawmakers are considering a medical marijuana bill. Marijuana use would be legal to help the pain and nausea for those with cancer, Lou Gehrig's disease and certain chronic illnesses. Senator Joe Bolkcom, an Iowa City democrat, filed the bill last week. He says he's gotten e-mails from people whose pain medication is ineffective. The bill calls for not-for-profit centers to acquire, cultivate and deliver marijuana and related supplies to qualifying patients.