The construction industry has shed some 700,000 jobs in the southwest border region since the market collapsed three years ago. And the industry may never quite boom again. That means cities are on the hunt for the next big employment opportunity. And many here are putting their hopes on biotechnology. But could biotech really put back to work all those welders and real estate agents? From the Fronteras Desk, Jill Replogle seeks the answer to that question.