51.   But the border crossing and the land around it can be a headache to patrol.

52.   But that is no longer true, as Attorney General John Ashcroft and others vow to make border crossings more rigorous.

53.   But when immigration officials discovered him at the Niagara Falls border crossing, stowed inside a tractor-trailer and carrying a forged passport, they simply let him go.

54.   But when U.S. immigration officials discovered him at the Niagara Falls border crossing, stowed inside a tractor-trailer and carrying a forged passport, they simply let him go.

55.   By mid-day, the Albanians had raced over the border crossing and looted the Serb border checkpoint.

56.   By Sunday afternoon, they had decided to simply approach a border crossing and ask permission to cross.

57.   Cellucci is also proposing the introduction of more electronic security systems, like the devices that read handprints or scan the eyes, to speed border crossings.

58.   Delays caused by the construction of border crossings into San Mateo County have not.

59.   Customs agents often work side by side with INS inspectors at border crossings.

60.   Diane Hinckley, the INS chief for land border crossings, said Congress has required the agency to develop ways to track foreigners as they come and go.