What is the 'balloon boy hoax', for which US parents were pardoned recently?
In 2009, Richard Heene and his wife Mayumi claimed their son had been carried away by a homemade helium balloon. It led to large-scale search operations as the balloon's flight was followed live by media. However, the boy was found in the attic of his home and authorities accused the parents of carrying out a hoax as a publicity stunt.