India, Sept. 5 -- After a recent meeting with Russian President Vladimir Putin in Beijing, North Korean staffers were seen meticulously wiping the chair, scrubbing the coffee table and even removing Kim Jong Un's drinking glass-apparently to erase any physical or biological traces the North Korea's "supreme leader" may have left behind. The aim was to prevent foreign intelligence agencies from collecting DNA or health-related clues such as skin cells, hair or saliva.

As the world watched with a significant display of diplomatic unity in Beijing while China's Xi Jinping, Russia's Vladimir Putin, and North Korea's Kim Jong Un met in public for the first time, the ritual followed by the North Koreans also made substantial headlines.

But th...