1.   Some hackers even take temporary positions on night cleaning crews so they can browse files, poke through trash or install devices to extract information.

2.   Because the plane had arrived late, cleaning crews quickly went through the cabin.

3.   A Clean House.Com owner Karen Ritscher said it is done occasionally, mostly during holidays by customers who have built a relationship with their cleaning crew.

4.   Cleaning crews were hard at work, cutting out stained sections of office carpet and mopping down floors and walls.

5.   Cleaning crews will be scrubbing cement pavements until they sparkle like stone.

6.   Cleaning crews and others with access to the plane must pass through a security checkpoint when they enter the plane and again when they leave.

7.   Coleman said this kind of closer scrutiny of cleaning crews and vendors who regularly visit any given building is a likely trend across the industry.

8.   Crime-scene photos showed a plain jug on the counter, but a cleaning crew washed it before police realized its possible significance.

9.   Even the cleaning crew is prohibited from entering the area.

10.   Garafola said the cuts had forced a cutback in mobile cleaning crews, making cleaning less frequent and more superficial.