It has been more than a year since Don passed away suddenly.Thinking about it still makes my heart hurt.I did not know Don Helmberger or any other famous geophysicists before joining the Seismological Laboratory at Caltech in 1989.In fact,I had barely heard of the Seismo Lab before I landed there,to some extent,by chance or pure luck.At the time,graduate applications were filed by paper.A fellow student gave me a Caltech application form,as he thought he was not good enough,and encouraged me to apply instead.Despite the lack of information at the time and my own ignorance,I took the opportunity.Little did I know,my academic journey had begun at that moment.