___By The Associated Press(equals) The Dow Jones industrial average fell 391.01 points, or 3.5 percent, and closed at 10,733.83.The Standard & Poor's 500 index fell 37.20, or 3.2 percent, to 1,129.56 The Nasdaq composite fell 82.52, or 3.3 percent, to 2,455.67. Benchmark crude slid $5.41 to finish at $80.51 per barrel in New York. Brent crude, used to price crude from foreign countries, fell $4.87 to finish at $105.49 in London. In other energy trading, heating oil dropped 8.57 cents to end at $2.8485 per gallon, while gasoline futures lost 10.65 cents to finish at $2.56 per gallon. Natural gas fell 2.5 cents to end at $3.705 per 1,000 cubic feet.