The Dow Jones Industrial Average dropped 542.4 points, or 1.23 percent, to 43,588.58. The S&P 500 declined 1.6 percent to 6,238.01, and the Nasdaq Composite slid 2.24 percent to 20,650.13.

LOS ANGELES, Aug. 1 (Xinhua) -- Four people were killed in a bar shooting on Friday in Anaconda, U.S. state of Montana, local media reported, citing law enforcement officials. The shooting occurred ...