WASHINGTON (AP) — Worried that the Army may have missed red flags about the alleged shooter in the Fort Hood massacre, the Pentagon will likely launch an inquiry into how all the military services keep watch on other volatile soldiers hidden in their ranks, officials said Tuesday.The probe, still in the planning stages, would be a broad examination ranging beyond the specific case of Army psychiatrist Dr. Nidal Malik Hasan, officials said. The inquiry, they said, could look at personnel policies and the availability of mental health services for troubled troops.