A method and composition for treating cancer comprising administering to a patient an effective amount of attenuated Salmonella typhimurium containing a plasmid carrying the coding sequence encoding a truncated human interleukin-2 and optionally an oil containing a high antioxidant concentration. The housing includes fixed vanes on a curved portion of the housing cover that have a lead ends, in a direction of circumferential crop movement, substantially in registry with trailing ends of the adjustable vanes. The system is further configured to validate the request and generate an activation key. This allows the memory system to both store and read data in the same cycle with no conflicts.