A few statistics from what was arguably the most expensive manhunt in history.
Most Wanted List: FBI
Reward: State Department
Cost of 9/11 attacks: 9/11 Commission (PDF)
9/11 death toll: The New York Times. Does not include hijackers.
Economic impact of 9/11: New York City Comptroller (PDF)
Costs of military operations: Congressional Research Service (PDF)
US casualties: Department of Defense
Civilian casualties: United Nations Assistance Mission in Afghanistan (PDF)
Drone attacks: "The Year of the Drone," by Peter Bergen and Katherine Tiedemann, New America Foundation
Al Qaeda members: "The Almanac of Al Qaeda," by Peter Bergen and Katherine Tiedemann, New America Foundation
Aid to Pakistan: Congressional Research Service (PDF)
Bin Laden compound: Christian Science Monitor, Google Maps
Helicopter cost: Department of Defense
Commandos and dogs: New York Times
Front page photo: caffeina/Flickr