 NASA will use their experiences to plan for actual crewed missions to the Red Planet, which they hope to begin launching in the late 2030s or early 2040s. A second person has been bitten by a shark off the waters of Florida's New Smyrna Beach. Police say a 26-year-old man was in an inner tube in about five feet of water late Friday when a shark bit his foot. It was the second shark bite within 24 hours.