global outlook is improving, everywhere except for the u.s., according to the organization for economic cooperation and development. the group is calling for the fastest global growth in about six years. but the organization downgraded its estimates for the u.s., citing delays in washington's plans to push ahead with fiscal policy proposals like tax cuts and infrastructure spending. >>> improving the nation's infrastructure was the message that the president took to ohio today. his focus was on the nation's waterways and the critical role they play in our economy. morgan brennan has more for us. >> reporter: in cincinnati, president trump talked levies, dams, locks and ports, in his infrastructure week. >> 20% of the energy's cargo relies on these channels and the refineries along their shores. these critical corridors of commerce depend on a dilapidated system of locks and dams that are more than half a century old. and their condition, as you know better than anybody, is in very, very bad shape. >> reporter: the inland water ways, nicknamed america's water highway, is used by tugboats and barges to ship commodit