'The Greatest Show on Earth' closes after 146 years

The curtain is coming down on "The Greatest Show on Earth" after 146 years, as Ringling Bros and Barnum & Bailey Circus lowers its big top for good.

The iconic American spectacle, which ends in May, was felled by a variety of factors, bosses say - declining attendance combined with high operating costs, changing public tastes and prolonged battles with animal rights groups all contributed to its demise.