What did Andrew Carnegie build after he built the bridge?

What does the ocean floor sink into the mantle? What is the salinity of Lake Michigan? What is the longest permitted name for a racehorse? Would capitalize public park in a sentence? What is so bad about the round goby? When was Kaduna Museum created? What year was Bathurst discovered in? How are plants in the upper beach adapt to survive in a desert like environment? How do fruit bats survive in the temperate forest? What are the strengths and weaknesses of a cable-stayed bridge? Why is Yellowstone a protected area? Give five sentences about river in sanskrit? What is removal of the lamina of the vertabral arch? How does the lack of atmosphere moisture in California's Mohave Desert cause a large daily temperature range? Contact information for whirlpool? What is all the names of the all airplanes? What is the widest suspension bridge? What are some of the laws and responsibilities of tourism planning? What country is the Mojave Desert in? What famous Delta Blues musician gets his name from the lower part of the Mississippi River?

What did Andrew Carnegie build after he built the bridge?