Authorities raided a residential suburban home in leafy Westchester County, New York Friday morning and walked out with enough fentanyl to kill nearly 2 million people, an official with the U.S. Drug Enforcement Administration. Five kilograms of the poisonously potent synthetic opioid were seized along with 6 kilograms of heroin, a more common street drug which, when spiked with fentanyl, has caused tens of thousands of fatal overdoses in America in recent years