In this April 26, 2015, file photo, daffodils grow on Mount Washington overlooking the skyline of downtown Pittsburgh, at the confluence of the Monongahela River, right, Allegheny River, left, to form the Ohio River. FILE – In this Feb. 10, 2017, file photo, a student walks past “Dippy the Dinosaur”, a life-size statue of the Carnegie Museum of Natural History’s first dinosaur find, a Diplodocus carnegii, in the Oakland section of Pittsburgh.