 I think always, in my life, when I look back, I was always interested in problems or projects where you have something to do, maybe you don't know how to do it, but you need to have something done at the end and I really enjoyed projects and I enjoyed things that involved math and science and I really liked computer programming when I started programming when I was in graduate school. And those are tools which I could use to solve problems and to analyze satellite data or other types of data and that got me interested not only in using those tools to analyze satellite data, but to understand what was being measured and how to measure it better. And so that's led to one or two new satellite systems where we can actually make these measurements better and now that we're interested in climate research, satellite observations are crucial for studying climate because you have them over the entire earth year after year, decade after decade, and so you're able to study how Earth's features vary over 30, 32 or even 40 years in some cases.