The Department of Justice late Friday afternoon staged a “document dump” of more than 1,000 pages related to the Operation Fast and Furious investigation, including some e-mail exchanges critical of Senator Charles Grassley, and one exchange that raises questions about what some Justice Department officials should have known was an erroneous statement in a Feb. 4, 2011 to Grassley. An earlier estimate of the number of documents from one sources has been reduced down from about 2,000, reported earlier by this column. The documents have gone to the House committee investigating the Bureau of Alcohol, Tobacco, Firearms and Explosives operation....