NEW YORK — A man grabbed two cordless power saws off a subway station workbench and went on a rampage Thursday, swinging the saws at riders and slicing open a man's chest before running away, police said. The 64-year-old victim, whose name was not released, was hospitalized in critical but stable condition. Police were searching for the suspect, described by witnesses as a thin man in his 30s, who had earrings in both ears and was possibly carrying a teddy bear. The attack occurred before dawn at a subway station a few blocks south of Columbia University. Wielding a saw...