61.   The closely watched case, which pits a hacker Web site against eight leading movie studios, is the first major challenge to the Digital Millennium Copyright Act.

62.   The deal promises to pose the first challenge to antitrust officials in the Bush administration.

63.   The first challenge was finding the right line, because of the dearth of instruction signs.

64.   The federal lawsuit is the first challenge to the two-month-old law in New York.

65.   The first challenge for the filmmakers was to make sure that Paquin would bond with the geese.

66.   The first challenge has been met, and the second is upon us.

67.   The first challenge in planning a vacation involves determining the right questions to ask.

68.   The first challenge is the easiest.

69.   The first challenge is to find it.

70.   The first challenge the new transitional government emerging from these sessions will face is enforcing its authority outside Kabul.