The shooting rampage that killed 13 people at Fort Hood in which a Muslim Army psychiatrist is the suspected gunman has set off a chain of inquiries into who knew what when.

In the post-9/11 era, government officials want to show that they are doing everything they can to protect the public and, when something happens, that they will get to the bottom of it.

The FBI says there is no information that Major Nidal Malik Hasan was involved in a “broader terrorist plot.”

TEXAS-SHOOTING/But that hasn’t stopped questions about whether authorities missed signs that could have somehow prevented the shooting.

U.S. officials say intelligence agencies learned that Hasan contacted an anti-American cleric in Yemen who was sympathetic to al Qaeda and relayed the information to law enforcement authorities, but it’s unclear whether any action was taken.