Dan Kaszeta is an Associate Fellow at the Royal United Services Institute. He also runs Strongpoint Security, a defence and security consultancy. Dan has 30 years of experience in chemical, biological, radiological, and nuclear (CBRN) defence. He started as an officer in the US Army Chemical Corps and remained in reserve service for years. As a civil servant, he served for six years as CBRN defence advisor in the White House Military Office and then served six years in the US Secret Service's Technical Security Division, serving principally in chemical and biological countermeasures. After moving to London in 2008, Mr. Kaszeta worked for 3 years for Smiths Detection before setting up his own consultancy firm in 2011. He is the author of several books and numerous articles. His most recent book is "Toxic: A history of Nerve Agents" (Hurst, 2020 and Oxford Univ Press, 2021).