updated 9:14 p.m. ET July 15, 2009
WASHINGTON - A chaotic（混乱的） scene unfolded near the U.S. Capitol on Wednesday after police shot and killed an armed man in what authorities described as a routine rush hour traffic stop that turned deadly.
U.S. Capitol Police spokeswoman Sgt. Kim Schneider said the unidentified 35-year-old man sped（超速行驶） away in a white car after being told to stop about a block north of the Capitol grounds. The man drove the wrong way down a street, ultimately striking two officers with his car, and crashed into a police cruiser, she said.
Police then opened fire after seeing the man hold up his handgun and refusing to put it down, said Schneider, who described the melee as "very fast moving, very fluid."