A gunman coolly drew a weapon from his pocket and opened fire at the teeming subway entrance to the Pentagon complex Thursday evening, wounding two police officers before being shot and critically wounded, officials said. Authorities said all three were taken to a hospital. Richard Keevill, chief of Pentagon police, said the two officers suffered grazing wounds that were not life-threatening. The suspect, identified as 36-year old John Patrick Bedell, allegedly walked up to a security checkpoint at the Pentagon in an apparent attempt to get inside the Defense Department headquarters, at about 6:40 p.m.