Elton John's latest musical hit -AIDA- opens its national tour in Minneapolis tonight. Based on a Verdi opera -the musical tells the story of a captain in the Egyptian Army who falls in love with a slave from the neighboring country of Nubia. Patrick Cassidy stars as the Egyptian Captian, named Radames (Rah-dah-mays). He told Minnesota Public Radio's Stephanie Curtis that he jumped at the chance to take on the role: