I’ve been lucky to have the chance to collaborate with Debbie while doing my post-doc in JILA with John. Debbie was a giant of science yet so approachable, encouraging and friendly. She had the rare ability to present her ground breaking work so eloquently, such that the most complex experiments and theories seemed simple. I’m so terribly sad to hear about her passing away. My deepest condolences to John, Jackie, and her family.