Most of the details of the raid that killed Osama bin Laden in May 2011 are still a secret.
After the operation in Abbottabad, Pakistan, the Obama administration released some information about what happened. But details of the planning, how it was carried out, and what happened afterwards are still classified.
Now a former Navy SEAL has written a book, called "No Easy Day", about the mission, some of which contradict the public statements made about what happened that day.
Al Jazeera's Rosiland Jordan reports from Washington, DC.