11.   They serve as spotters for the weather service, a loosely knit group of enthusiasts who watch for severe weather and report their observations.

12.   To working parents, though, these tightly knit groups appear closed to them.

13.   With George Macunius, he established the loosely knit group known as Fluxus, which accepted any activity as art and played fast and loose with definitions.

14.   Authorities believe Ambrose is affiliated with the Earth Liberation Front, a loosely knit group that claimed responsibility for spiking the trees.

15.   Investigators say they determined Dylan Klebold and Eric Harris did not belong to the loosely knit group.

16.   It was launched by a loosely knit group called The Civic Initiative for Enlightenment, which formed after allegations surfaced of ties between government leaders and underworld figures.

17.   Rubin was a leader of the Yippies -- the Youth International Party -- a loosely knit group of radicals who protested the government and the Vietnam War.

18.   Rubin was a Yippie leader -- the Youth International Party -- a loosely knit group of radicals who protested the government and the Vietnam War.

19.   The Soviet market was largely limited to a handful of state-run shops and tightly knit groups of private collectors and dealers trading on the black market.