Posted on March 1, 2017 by Eric NiilerKeeping Fentanyl Out of the US Will Take More Than a Wall Rooting out synthetic opioids like fentanyl is a game of whack-a-mole; once the DEA targets a specific chemical composition, a new one pops up. The post Keeping Fentanyl Out of the US Will Take More Than a Wall appeared first on WIRED.