Talk about tough choices! I'd like to meet them all - all are inspiring and important figures who 'walked the talk'.
However, I choose Nelson Mandela... because I would want to ask him how he could keep his soul and spirit alive for such a long time under extreme and impossible conditions. I would want to sit next to and breathe the same air as someone so incredible and enduring as he is. Because I could never imagine or contemplate the ability or moral courage and endurance he possesses. I think Nelson is a National, no, International Treasure.