41.   Continuing security checkpoints and unexpected road closures can still make driving a harrowing experience.

42.   Continental also warned United and Denver International Airport not to install sizers at the three security checkpoints controlled by United and used by other carriers.

43.   Counters for ticketing and check-in will be next to the security checkpoint at the entrance to the main concourse and at the gates.

44.   Delta and other airlines have added lanes to security checkpoints, to help move more passengers through promptly.

45.   Elsewhere Sunday, the Israeli siege of the Church of the Nativity continued in Bethlehem, as did the tight security checkpoints and the violence.

46.   Entering the theater building, the security checkpoints create a tension and a sense of event.

47.   Even if we had had time, we could not ride out to see the American naval base because of security checkpoints.

48.   Even with air traffic on the wane, lines at the ticket counters and security checkpoints were long, but moving quickly Tuesday.

49.   Federal officials have long criticized the effectiveness of the security checkpoints, which are typically run by contractors working for the airlines.

50.   Federal aviation authorities evacuated a Southwest Airlines concourse of Baltimore-Washington International Airport on Saturday morning after a woman bypassed a security checkpoint, officials said.