After Osama bin Laden was killed in May, the house where he was found was teeming with journalists and quite open. Now, the Pakistan Army surrounds the house with vegetation growing thick around it. Things have definitely changed.

CNN's Nick Paton Walsh travels to Abbotabad, Pakistan, to visit one of the few reminders of the architect of the September 11, 2011, attacks as the world is still asking – how did bin Laden live here so long?