Congress on Friday made public a long-classified document detailing possible connections between the Saudi government and the Sept. 11 terrorist plot. The document, a section of a 2002 congressional inquiry into the Sept. 11 attacks, had been kept secret out of concern that it might fray diplomatic relations between the United States and Saudi Arabia. Its release marks the end of a yearslong fight by lawmakers and families of the Sept. 11 victims to make public any evidence that the kingdom might have played a role in the attacks. Much of the push over more than a decade to get the document declassified was led by former Senator Bob Graham, the Florida Democrat who was one of the co-chairmen of the congressional inquiry. Mr. Graham has long said that releasing it would provide compelling evidence that the Saudi government had a direct hand in the terrorist plot.