2004 Wangari Maathai

Kenyan Nobel Peace Prize laureate and the country's Deputy Environment Minister Wangari Maathai speaks during the commemorative e... Credit: AP

Nobel Peace Prize laureate Wangari Maathai from Kenya, right, shakes hands with Norwegian Queen Sonja in Oslo City Hall Friday, De... Credit: AP

Nobel Peace Prize laureate Wangari Maathai, right, receives her prize and certificate from Nobel Committee Chairman Ole Danbolt Mj... Credit: AP

Nobel Peace Prize laureate Wangari Maathai speaks after receiving her prize at Oslo City Hall, Friday, Dec. 10, 2004. Maathai, a K... Credit: AP

Nobel Peace Prize laureate Wangari Maathai holds her prize and certificate at Oslo City Hall, Friday, Dec. 10, 2004. Maathai, a Ke... Credit: AP

Supporters of Nobel Peace Prize Laureate Wangari Maathai cheer as Maathai appears on her balcony at the Grand Hotel in Oslo, Frid... Credit: AP

Nobel Peace Prize laureate Wangari Maathai gives a thumb up before entering Oslo City Hall to receive her award Friday Dec. 10, 20... Credit: AP