Dr. Yanglai Cho, a founder of the Advanced Photon Source (APS), passed away on June 14, 2015 at the age of 82, of complications from pneumonia.  Dr. Cho received his BS in Physics in 1956 from Seoul National University and his Ph.D. in 1966 from Carnegie Institute of Technology (CIT).  His distinguished career at Argonne began in 1967 after his early career as an instructor and research scientist at his alma mater, CIT.  According to APS User News (Link to https://www1.aps.anl.gov/APS-News/Yanglai-Cho-a-Founder-of-the-APS-Dies-at-82), Dr. Cho was the primary force behind the Argonne’s effort in building the Advanced Photon Source. He served as Project Director, and then Deputy Associate Laboratory Director of the APS. He was Technical Director of the SNS from 1999 to 2001 at Oak Ridge National Laboratory during the facility’s early development.  Dr. Cho was awarded the University of Chicago Distinguished Performance Award by Argonne in 1986. 

He is survived by his wife, Marion White and his sons Hyunjin Eugene, Hyunduk Adrian, and Hyunsung Elliot; daughter-in-law Janine Lanza and daughter-in-law emerita Karin Cho; and grandchildren Vincent, Brianna, Audrey, and Emmett Cho; Thomas O’Malley; and John-David Leitke.