Families were allowed to walk down into the towers' "footprints", ground once combed for the tiniest fragments of human remains.
One of them is Hemphill, Texas, about 170 miles north of Houston, where a roadside monument and a museum commemorate the disaster and the volunteers who combed the surrounding woods for pieces of the spacecraft.
Others combed the city searching desperately for missing loved ones.
Thomson Reuters, which did the data crunching for THE, combed through 6 million journal articles published over a five-year period, and then calculated how many times those articles were cited by other scholars.
In three years the crew has combed through 800 applications looking for promising companies that don't need millions in startup capital and that stand a chance of making measurable progress in just three months.
For help, I combed through the web and turned to three of my job coach sources.
To profit from such disparities, enterprising investors have long combed the world's bourses looking for cheap stocks.
French and Malian troops have combed the northern city of Timbuktu searching for Islamist rebels thought to be hiding in homes after fierce fighting.
Law enforcement officials combed through photos and surveillance videos, searching for clues to who detonated the bombs.
Authorities also combed the Fowler's home and neighborhood looking for evidence.
As search-and-rescue teams checked the conditions were safe enough for a diving team, fire-fighters combed the riverbank.
As news cameras trained on the governor while he signed each measure, investigators combed Clements' neighborhood, talking to neighbors and searching for clues.
The death toll at Rana Plaza has jumped by about 100 each day for the past week, as salvage workers combed through the ground floor and basement levels.
Seventeen search teams on Saturday combed a 5-mile radius of the mountain, searching for any signs of Emerson.
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For its salary survey it went beyond its members and combed through data from the Bureau of Labor Statistics, the Census Bureau and a master set of data developed by a compensation measurement company called Job Search Intelligence.
Thus armed, Spitzer's office combed through 30, 000 pages of Merrill documents and e-mails, looking for trouble.
She combed through the free furniture listings on Craigslist, and scoured Goodwill and cheaper outlets for good deals.
The evidence is there for everyone to see and the 140 - page document has been evaluated and combed through by many legal experts and politicians.
While it's far from a complete list--certain names were excluded for security reasons and the administration has released only partial records for visits prior to Sept. 15, 2009--we've combed through the names to determine who's visited the White House most and who has attended the greatest number of events at which the president has been present.
After running his fuzzer program on the applications for 3 weeks each, Miller found nearly a thousand unique ways to make the programs crash, and combed through those data to find which of those bugs allowed him to take control of the program.
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