this father lost his wife and 8-year-old son this was a bloody, gruesome crime. all of them were head shot in an execution style. dangerous escape the u.s. finally evacuating american civilians from war-torn sudan. new details on their treacherous journey guarded by military drones overhead. coast-to-coast flooding and the weekend washout for the northeast that s not letting up we re tracking the storm. a fiery drone attack inside russian-held territory. was ukraine behind it? the giant mass of seaweed twice the size of the u.s. heading straight for florida s beaches. we re out with researchers to see it firsthand why is it so much worse this year pothole nation why america s roads are so brutal this spring, and how some cities are fighting back and the stone of destiny. the ceremony today for a historic relic one week before king charles coronation announcer: this is nbc nightly news with jose diaz-balart. good evening last night in a small town just nor
in the first place we think it has something to do with the fact that not all stargassum is the same. reporter: the seaweed is already invading hot spots, from the keys to miami beach, creating an increasingly ugly and nasty-smelling mess what we ve already witnessed on the shores of florida, is that the tip of the ice? i think it s just beginning. we probably have months worth of that coming. reporter: researchers still don t know what s fueling this unprecedented growth, but to get answers, they re collecting three different types. these are some of the best clumps we ve had all day. reporter: and measuring factors like salt content. it looks great. it s 37.9 parts per thousand and 26.5 celsius. reporter: water temperature and other conditions that might explain why it s exploded in size to 13 million tons of the algae. right now we re about six miles offshore from florida. look over my shoulder at blankets of stargassum