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Workers with Pogo Tree Experts use a Hydro Seeder to spray grass seed onto the National Mall as part of a turf restoration project on Monday, oct. 13, 2007.

Workers with Pogo Tree Experts use a Hydro Seeder to spray grass seed onto the National Mall as part of a turf restoration project on Monday, oct. 13, 2007.

Copyright © 2007 Roll Call Photos