Many post offices will be closed for at least the next two Saturdays and new construction projects will be cut by half as part of a package of budget cuts, the U.S. Postal Service announced. Saturday mail delivery will continue, but as many as half of the nation's post offices will be closed the two Saturdays, Postmaster General Preston R. Tisch said. In addition, service could be further reduced with closings of as much as one-half day each week, he said. The reductions are required by deficit-cutting legislation enacted Tuesday that trims postal spending $1.25 billion.