dr. lisa grant ludwig, president elect of si s irvine. pacific northwest seismic network and professor in the department of earth and zion -- excuse me, earth and space science university of science. dr. desroches, georgia institute of technology. like all witnesses your written testimony will be in the record so ask your onal statement be five minutes. press the button when you are ready to begin. i'd also like to explain how our timing lights work. when you begin to speak our clec will start the timer and a green light will appear. after four minutes a yellow light will appear. you should begin to conclude your statement. at five minutes the red light will come on and i would ask you conclude at that time. dr. leith, thank you for being here and you may begin. >> mr. chairman, members of the subcommittee, thank you for the opportunity to discuss the significant advances in earthquake science that have been made over the past 50 years. the usgs proud to be a partner with private sector and other colleagues in ongoing research and monitori

dr. ludwig and jay thomas. you worked with robin williams early. we saw clips of you in mork & mindy. what are your memories that you have of robin williams right now? >> well, you know, i don't know that robin changed very much, you know, we're talking over 30 years, and i don't pretend to be robin's best friend or pal, but, you know, you see stuff early on. i mean, there's no doubt that we at that time had a great time. i'm lucky, don't seem to have an addictive personality, but, you know, it's handed to you, and you can scrape it in with both hands and you're insulated, also, there's no one who's going to stop you from doing anything, so it's almost a childish existence. if you have a problem, then you're like a kid everybody gives candy to. robin early on, we saw that he had a problem, late for work, there was drinking, there was drugs, but we were all there kind of doing the same thing exempt a lot of us woke up the next day and got to work and it wasn't as big a problem. >> dr. ludwig, what is the key to one performer having a problem, another performer not having a problem? we