This Sept. 15, 2009 file photo shows marijuana plants in Seattle. Patients treated at Veterans Affairs hospitals and clinics will be able to use medical marijuana in the 14 states where it's legal, according to new federal guidelines. The directive from the Veterans Affairs Department in the coming week is intended to clarify current policy that says veterans can be denied pain medication if they use illegal drugs. Veterans groups have complained for years that this could bar veterans from VA benefits if they were caught using medical marijuana. (AP Photo/Ted S. Warren, File)

Photo by: Ted S. Warren

This Sept. 15, 2009 file photo shows marijuana plants in Seattle. Patients treated at Veterans Affairs hospitals and clinics will be able to use medical marijuana in the 14 states where it's legal, according to new federal guidelines. The directive from the Veterans Affairs Department in the coming week is intended to clarify current policy that says veterans can be denied pain medication if they use illegal drugs. Veterans groups have complained for years that this could bar veterans from VA benefits if they were caught using medical marijuana. (AP Photo/Ted S. Warren, File)