Sitting up and smiling: First picture of heroine of Fort Hood who took down gunman... but how did FBI let him slip through net?

U.S. President Barack Obama has denounced the 'twisted logic' that led to the deaths of 13 people in the Fort Hood shooting rampage. But even as Obama honoured the dead in a memorial ceremony, there was government finger-pointing over what had been known about Hasan's background and whether he should have been investigated further.