Part of Robert Summers's sculpture, "The Waco Chisholm Trail Heritage," near the historic Waco Suspension Bridge, now a pedestrian and bicyclists' bridge across the Brazos River in Waco, Texas. The full sculpture depicts several cowboys and a Mexican vaquero driving longhorn cattle. Cattle were in fact driven across the suspension bridge in its early days, when it was covered with dirt. It is now lined with thousands of bricks. At at the time of its completion in 1870, it was the longest single-span suspension bridge west of the Mississippi River. The bridge was built with cable supplied by the John Roebling Co., who built the Brooklyn Bridge in New York City. Photo by Carol Highsmith.