21.   To trace the path of a pollutant, researchers tell HYSPLIT where and when it was released.

22.   To see through the dispute, trace the path of a surplus dollar, a dollar of Social Security payroll taxes that is not currently needed to pay retirees.

23.   To trace the path of new-economy investing, fast feet and a good line of technospeak are required.

24.   With that network, astronomers could determine the direction a gravity wave is moving and trace its path back to its source.

25.   And the peacekeepers would be trying to trace the path of the bullets they acknowledge firing.

26.   In fact, the U.S. government is now working on proposals to help investigators trace the path of ill-gotten gains.

27.   The MARV propelled itself on tiny wheels across a sheet of plastic, tracing the path of a red wire taped under the plastic.

28.   Tracing the path of this gas is one way of figuring how the Milky Way and other galaxies evolved.

29.   U.N. officials said their tracking radar did not trace the path of the shell so they could not immediately comment on its origin.

30.   What they actually saw was a meteor shower from the Tempel-Tuttle Comet that is tracing a path near earth.