scott weiss, professor scott weiss, prefer of -- over water and health, management and advice costty, and also this -- a book changing water manage independent mexico. and with that we'd like to begin with professor ochoa. >> thank you very much. and everybody for attending here. one of the things that we've considered in this book is how some of the complexities of living on the border as it relates to immigrant subjects has been considered, so, in our particular book, as you might imagine, we address this particular issue by the viewpoint of researchers who are out on the border trying to research this phenomenon we all are familiar with. some of the things we learned from this exercise is the complexity of the environment as it relates to research...

scott cohn up with a special report. let's meet today's starting lineup. pete, jon, weiss, murphy here with us today and we do begin with the fresh concerns over china's economy and its impact on our markets here at home. you may have noticed the commodities have been getting crushed this week. oil is at a one-month low. iron over has been slammed. copper has been in free-fall. soybeans selling off. from stock markets around the globe are taking notice so, too, is our panel. pete, how concerned should we be because i don't feel there's any concern about what's going on in china. >> you are seeing some concern, scott, reflected by the volatility, the way the volatility index itself has been volatile. we've been 14, 16, bouncing back and forth across those levels. i think very importantly you do want to watch what's happening with copper. when you see copper just late in week last week trading closer to 320. now we're dipping underneath $3. the $3 level is a mindset area that we want to keep an eye on. we're just barely underneath that at 297. >> copper is at four-year lows.