A big gain in the job market lifted the stock market to a record high this morning. The Dow Jones industrial average crossed 15,000 for the first time, and the Standard and Poor's 500 index, a broader market measure, rose above 1,600. In the first hour of trading, the Dow jumped 173 points to 15,004, a gain of 1.2%. The S&P surged 20 points, or 1.3%, to 1,618. It has been 13 years since the latter index broke through 1,500. Click for more on April's jobs report.