By Ayesha Rascoe and Julia Edwards WASHINGTON, Aug4 (Reuters) – A 115-year-old U.S. law aimed at preventing unlawful animal trafficking may be difficult to enforce in the case of an American hunter who killed a celebrated Zimbabwean lion. The killing last month of 13-year-old Cecil, a rare black-maned lion, sparked international outrage among animal lovers. Walter Palmer, a Minnesota dentist, has admitted to killing the lion, but has said through a publicist he thought the hunt was legal.
