Recentely learned a little more about Fentanyl, and opioids in the US. It's really a crazy story. Watch Dopesick on Disney or Painkiller on netflix to get an idea. Or you can read this article on the New Yorker
Oxycodone didn't make it to Europe probably just because we have more strict regulations, but Fentanyl that lives and spreads through dark web is really scary.
This picture I shot with my phone just outside my hotel in NY.
