In this newscast: A few days after the glacial dam release flooded the Mendenhall River, a small group of scientists took a helicopter to the source, to find out why this year's flood was so devastating, and what that might mean for future floods in Juneau; The U. S. Department of Transportation is sending Alaska more than $44 million to install fish-friendly culverts and other means to get migrating salmon to the other side of roads; A team of scientists wanted to answer some questions about a trove of footprints left along the middle section of the Yukon River earlier this month, and they came back with those answers