1.   The visitors were herded into two large halls, which were once the hotel ballroom and dining room.

2.   The visitors were herded into two large halls.

3.   Security guards herded visitors and workers down stairwells as a disembodied voice on a public address system urged office employees to turn off their coffee makers.

4.   To see them, visitors are first herded through a series of video rooms where the history of the jewels is presented.