Blank Park Zoo in Des Moines, Iowa, is showing off three new lion cubs. The cubs had their first physical check-up on November 20, one week after they were born. Before visitors are allowed to see them, the cubs must go through a series of vaccinations which will take a few months. The International Union for Conservation of Nature lists the African lion as "vulnerable" and says populations are declining. Threats include loss of habitat because of human encroachment and poaching.