Shin Dong-hyuk is a human rights activist and the only person born in a North Korean labor camp known to have escaped to the West. Dear Mr. Rodman: I have never met you, and until you visited North Korea in February I had never heard of you. Now I know very well that you are a famous, retired American basketball player with many tattoos. I also understand that you are returning this week to North Korea to coach basketball and perhaps visit for the third time with the country’s dictator, Kim Jong Un, who has become your friend. I...