veto - The procedure established under the Constitution by which the president refuses to approve a bill or joint resolution and thus prevents its enactment into law. A regular veto occurs when the president returns the legislation to the house in which it originated. The president usually returns a vetoed bill with a message indicating his reasons for rejecting the measure. The veto can be overridden only by a two-thirds vote in both the Senate and the House. Summary of Bills Vetoed, 1789-present
Congressional Sessions lists all Congresses and corresponding years - from 1789, when the 1st Congress met, through the current Congress.
You can access legislative information, by bill number or key words, from the THOMAS Web site. Information from the present back to the 93rd Congress (1973) is available on THOMAS.
For information on the Senate, Congress, the legislative process and the federal government, the Virtual Reference Desk is a good place to begin.