Support WBURBuilt For Counterterrorism, This High-Tech Machine Is Now Helping Fight FentanylPlay04:14Download AudioMartha BebingerNovember 27, 2019 ShareThe MX908 can check for the presence of fentanyl mixed with other drugs and such testing may help prevent overdoses. Sarah Mackin of the Boston Public Health Commission prepares the machine for testing some samples. (WBUR)