FILE - This combination of file photos shows Kim Jong Nam, left, exiled half-brother of North Korea's leader Kim Jong Un, in Narita, Japan, on May 4, 2001, and North Korean leader Kim Jong Un on May 9, 2016, in Pyongyang. The apparent assassination of the North Korean leader’s estranged half-brother is strengthening bipartisan calls for the U.S. to re-list Pyongyang as a state sponsor of terrorism, a designation lifted nine years ago. Doing so would increase the country’s isolation, while potentially complicating any future diplomacy to halt its nuclear and missile programs. (AP Photos/Shizuo Kambayashi, Wong Maye-E, File)