Dr. Mark Dibben (right), mass spectrometry flight chief for the Air Force Technical Applications Center, Patrick AFB, Fla., explains to members of the Cocoa Beach Regional Chamber of Commerce's Military Affairs Council how the center uses mass spectrometry as a means to execute its nuclear treaty monitoring mission. The council toured AFTAC's radiochemistry lab Oct. 16, 2019. (U.S. Air Force photo by Susan A. Romano)