By Idrees Ali and Patricia Zengerle WASHINGTON (Reuters) -A motorist rammed a vehicle into U.S. Capitol police on Friday and brandished a knife, killing one officer and injuring another and forcing the Capitol complex to lock down in an attack that police said did not immediately appear to be terrorism-related. Police responded by firing on the suspect, who died. Yogananda Pittman, acting chief of the U.S. Capitol Police, told a news conference that the suspect drove into the officers, then hit a barricade and got out of the car, lunging at them with a knife in his hand. “It is with a very, ve…