A US man who triggered a major alert in October by falsely claiming his son had been carried away in a helium balloon, has been sentenced to 90 days in prison and his wife to 20 days. . The judge said, the man, Richard Heene, and his wife, Mayumi were guilty of deception. <br/> <br/>The couple carried out an elaborate hoax in which they pretended that their six-year old son had been carried away by their home made helium balloon. TV cameras and the National Guard tracked the balloon tracked the balloon for several hours, but over time, it was found that the boy, Falcon Heene, was hiding at home. Under investigation, the couple admitted they had planned the stunt in the hope it would lead them to a reality TV show.<br/><br/>