Under a "test" program some Mexican trucks can now cross into the U.S. to deliver cargo. American trucks are also allowed into limited areas of Mexico. This cross-border test program is still going on, even though Congress passed and President Bush signed a law intended to cut off funding. Today, Secretary of Transportation Mary Peters is holding a news conference to try and keep the program alive. Opponents have sued in federal court to try and get it shut down arguing that Mexican trucks are dangerous and don't meet U.S. safety standards.