Corey Knowlton won right to kill the animal at an auction last year . But he was waiting for permission to bring the carcass back to the U.S. 150,000 people signed petition demanding his request should be denied . The National Rifle Association has been lobbying against a ban on importing trophies from Canada and other countries where hunting is legal, saying it would hurt hunters in those countries.
Corey Knowlton won right to kill the animal at an auction last year . But he was waiting for permission to bring the carcass back to the U.S. 150,000 people signed petition demanding his request should be denied . Namibia sells small number of Rhino-hunting licences every year . Money is used to fund anti-poaching efforts under controversial scheme .