Trade wars may be raging but it has been a busy two weeks for foreign-flagged cargo ships coming up the North River bringing imports or collecting exports up north. On Friday afternoon, Diamond Sky, a 625-foot Malta-flagged bulk ship passed the towers of Fort Lee and the Englewood Cliffs where leaves are just starting to turn. They were heading for the Sims Metal dock in Albany where they are probably loading scrap for export, though they may have arrived in New York with salt as the ship originated in Chile.