There are also barriers along Jackson Street, which borders the rear entrance to the complex. This week, for the first time, a metal detector and security guards were positioned in the lobby of the FBI's Dallas headquarters building. And they will remain after this weekend. Federal officials said they do have one advantage on this particular April 19. It falls on a Saturday, when most federal offices will be closed.
Post offices are an exception, but they mostly have limited hours.
In any event, upgraded camera and security systems have been permanently installed at postal facilities in the Dallas area. The U.S. Postal Inspection Service has contingency plans for a possible weekend of violence, although officials stressed Thursday that they have not received any threats. Security has been tight for months at the Denver courthouse where jury selection began March 31 for Mr. McVeigh 's trial. Concrete planters and barricades surround both the U.S. Courthouse and the adjacent federal building. Nearby parking has been banned.