Photograph of the Brooklyn Bridge waterfall by John Del Signore; you can see the safety line Yesterday, we noted that two kayakers were rescued from the temporary Brooklyn Bridge waterfalls yesterday afternoon, and now there are some more details: The novice kayakers, in a two-man kayak, had been in a group of kayakers paddling from Governors Island to DUMBO and wanted a closer look at the falls. Their group's leader, Erik Baard, described Bert......