US President Donald Trump on Monday signed an executive order (EO) designating illicit fentanyl, a powerful synthetic opioid driving the US overdose crisis, as a weapon of mass destruction. The EO issued by the White House asserted that “Illicit fentanyl is closer to a chemical weapon than a narcotic” due to its extreme potency. “Two milligrams, an almost undetectable trace amount equivalent to 10 to 15 grains of table salt, constitutes a lethal dose,” it said. The order highlights the national...