21.   They gathered behind the center field fence, where they kept keen watch on the calls of the home plate umpire.

22.   To a standing ovation from their friends and parents, they bounded off the bus and gathered behind a lectern beside Island Pond, at the center of town.

23.   When editors gather behind closed doors for meetings five times a day, are they really discussing the news?

24.   Working for the mysterious Special Operations Executive, he created secret codes for British agents gathering information behind enemy lines.

25.   OPEC ministers are gathering behind closed doors in Vienna, but there is little concern it will result in higher prices at the gasoline pump.

26.   OPEC ministers gathered behind closed doors Thursday night, presumably to discuss how much oil they might pump.

27.   Police blocked off the street and crowds gathered behind barricades as police dogs searched for clues.

28.   As the strike fizzled, congressional support gathered behind Cardoso.

29.   Dozens of other rafters gathered behind the double fences of the detention center when the latest arrivals were brought in about noon.

30.   Dozens of other rafters gathered behind the double fences of the detention center when the latest arrivals were brought in.