The AFS extends its condolences to the family and friends of Professor Emeritus Darrell Reneker, who passed away on October 17 at the age of 91. 

Professor Reneker began his career during WWII as an electrical engineer, having earned his B.Sc. in Electrical Engineering from Iowa State University. He returned to graduate school and earned his Ph.D. in solid state physics at the University of Chicago 1959, where he was classmates with the famed astrophysicist Carl Sagan.