A worker uses a blowtorch on an interchange bridge in Englewood, Colo., on Aug. 25. Construction workers for infrastructure projects around the country are in short supply.
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Native Americans march to a sacred site on Sunday that they say was disturbed by bulldozers working on the Dakota Access Pipeline, near the encampment where hundreds of people have gathered to join the Standing Rock Sioux tribe's protest.
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Following the U.S. Army Corps of Engineers' recent approval of the proposed Dakota Access Pipeline, a coalition of environmental activists held a rally in New York City's Union Square Park to oppose the project.
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A worker in Claysville, Pa., shovels the fine powder that's part of a watery mixture used in hydraulic fracturing. Silica dust is created in a wide variety of construction and manufacturing industries, too.
The $1 billion Brickell City Centre, currently under construction, will house condos, a hotel and a retail and entertainment complex. Condo projects are booming in Miami, financed mostly by foreign buyers.
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Men sit by the side of the Panama Canal as a ship sails past in Gamboa near Panama City, last month. The expansion project is aimed at accommodating the world's largest container ships.