Americans do not need much convincing that Osama bin Laden is to blame for the attacks on Washington and New York City. Which is fortunate, because we may never have the forensic comfort of a videotape or signed contract. Clear links are almost impossible to find in shady terrorist networks designed to have none.
To make matters murkier, the U.S. government is reluctant to share any evidence it may have. On Friday, White House press secretary Ari Fleischer said publicizing evidence would compromise the investigation: "[The terrorists] would like nothing better than to be able to hide where they are hiding...