Wall Street falls on job woes and energy
Highlights:
* A profit warning from Dow component Chevron , whose shares fell 2.1 percent, dragged energy shares lower.
* The Dow Jones industrial average was down 72.56 points, or 0.83 percent, at 8,669.90. The Standard & Poor's 500 Index was down 9.51 points, or 1.05 percent, at 900.22. The Nasdaq Composite Index was down 19.56 points, or 1.21 percent, at 1,597.45.
(Editing by James Dalgleish)