** FILE ** Former President Jimmy Carter (left) waves to onlookers after arriving at Boston's Logan International Airport with Aijalon Gomes (right) on Aug. 27, 2010. Mr. Carter flew to the North Korean capital, Pyongyang, on a private mission to secure a pardon for the 31-year-old Mr. Gomes, an American who was detained in January after crossing into the country from China. (AP Photo/Winslow Townson)

Photo by: Winslow Townson

** FILE ** Former President Jimmy Carter (left) waves to onlookers after arriving at Boston's Logan International Airport with Aijalon Gomes (right) on Aug. 27, 2010. Mr. Carter flew to the North Korean capital, Pyongyang, on a private mission to secure a pardon for the 31-year-old Mr. Gomes, an American who was detained in January after crossing into the country from China. (AP Photo/Winslow Townson)