1.   Afterward, he slipped unnoticed back into Canada, carefully plotting his Los Angeles attack over many months.

2.   Airlines get together and trumpet some historic change, but then, under market pressure, things slip right back where they were.

3.   Then they lost four of their next six games and slipped six back.

4.   The rebels apparently slipped further back into the Lacandon Jungle without risking a fight.

5.   The rebels had apparently slipped farther back into the Lacandon Jungle without risking a fight.

6.   Troops entered rebel territory on Friday, and most of the rebels apparently slipped further back into the Lacondon Jungle without risking a fight.