Cold spraying by Matthew Modoono January 12, 2018 Share Facebook LinkedIn Twitter Bob Allegretto, NU Cold Spray & Automation Technician, prepares to adhere aluminum together in the Cold Spray lab inside The George J. Kostas Research Institute for Homeland Security on Jan. 11, 2018. Photo by Matthew Modoono/Northeastern University Bob Allegretto, a cold spray and automation technician, prepares to adhere aluminum together in a lab at Northeastern’s George J. Kostas Research Institute for Homeland Security in Burlington, Massachusetts, on Wednesday afternoon. Photo by Matthew Modoono/Northeastern University