The saddest spreadsheet in the world? Via io9:
For the past six years, the U.S. Air Force has been compiling an exhaustive list of every bomb their planes have dropped since World War I.
The database, which is part of a project called THOR (Theater History of Operations Reports), was put together by Lieutenant Colonel Jenns Robertson using thousands of historical documents.
For the Vietnam War alone, Robertson has examined records showing that from October 1965 to May 1975 at least 456,365 cluster bombs were dropped on Cambodia, Laos and Vietnam. The database is also being used for current conflicts, including investigations into civilian deaths in Afghanistan and Iraq.