In memory of Bill

Our paths joined in 2012 when I spent a six month sabbatical with him at MPL. He and Gaby were the most welcoming of hosts, and this started off a 12 year bicoastal collaboration that was unique and inspirational. Bill was humble, always non-threatening, welcoming new ideas and always presenting his side of the story with a way of thinking that was rare and perceptive. I would return from my week-long trips to UCSD mentally exhausted, but with an onslaught of new ideas. Our intellectual partnership was one of a kind—a once in a lifetime association. And I am so thankful and fortunate that he was part of my professional life over the past 12 years. He became like an older brother to me. It is so hard to accept that he is no longer with us. However, in his memory, we can all strive to emulate his selfless, unassuming character—supporting and inspiring a new generation of scientists. [Work supported by the Office of Naval Research.]