The latest question for Kenyan authorities is over an apparent warning made about an attack here around a year ago. The question: Was prior intelligence ignored?
Today the government has been speaking only about progress: Saying they have recovered one of the terrorists' cars. They say they are now certain there were 10 to 15 militants involved and that five were killed by gunfire.
But that raises another question: What happened to the others? Were they all detained or did some escape?
I understand that one theory being taken seriously by the police here is that some used their knowledge of the site and an underground tunnel to get away during the early hours of the raid.
As attention focusses on the militant group al-Shabaab, ITV News has spoken to a preacher accused of being their top recruiter.
A man who helped save the lives of shoppers caught in the Nairobi mall terror attack revealed he ran there after a text from his brother.
Kenyan officials have released new footage showing the devastation inside the Nairobi shopping centre after the terror attack.