Lisa Stahl in Ohio, "I did listen to some of the relatives associates calling the defendant a assassin. The police office is now contacting "Dateline" to attempt and assist. HANSEN: He leaves via the again door and the police are ready. One big aim of the discussion about a distinct net are cryptocurrencies and so-termed blockchain engineering, whose most magnificent tale so significantly has been the rise of Bitcoin. Norah, what is this story?