The collective bargaining agreement between NBA owners and players expires tonight at midnight.

FORBES: Bye, Bye NBA--See You Next Year

As explained above, if the players association does not file to decertify before the agreement expires tonight, they will have to wait six months after the date they decertify to file an antitrust claim.

FORBES: NFL Labor Talks: Watch the Players, Not the Owners

And the Foreign Intelligence Surveillance Act expires tonight.

NPR: Week in Review: Superdelegates, Clemens Testimony