ARL News Dr. Lester Machta, Founding Director of ARL   September 4, 2001 Dr. Lester Machta, founding Director of the Air Resources Laboratory, passed away on Friday, 31 August, 2001. Dr. Machta retired as Director of ARL in 1989, but remained active in the research operations of the laboratory until his death. His research work … Continue reading ARL News: Dr. Lester Machta, Founding Director of ARL – September 4, 2001