Congrats to Logan, whose work simulating halide segregation in mixed-halide perovskite nanocrystals was presented in the Organic and Hybrid Light Emitting Materials and Devices conference at SPIE today. Many thanks to Michael Crawford, who made the initial measurements that we are trying to explain, and Matthias Agne and Elana Cope for their assistance with DFT calculations. We are grateful to Tae-Woo Lee, Franky So, and Ji-Seon Kim for organizing the conference and for the invitation to share our work.