in the sky whwhy the pentagon s warning tonight is not about alien life the severe weather threat across the plains millions facing high winds and large hail in the middle of the country. our series, climate challenge, the threat facing some endangered gentle giants of the sea, but also signs of hope and the official end of a bygone era, streaming giant netflix pulling the plug on its dvds by mail announcer: this is nbc nightly news with lester holt good evening, and welcome. they are the things that happen all the time, a mixed up address, pulling into the wrong driveway, or confusing one car from another, yet remarkably for a third time in a week, seemingly innocent moments of confusion have led to bloodshed from kansas city where a teen who approached the wrong doorstep is recovering from two bullet wounds, to new york state where a 20-year-old woman was fatally shot after the car she was in accidentally drove up the wrong driveway, and now in elgin, texas, a h
a suspect now in custody. in missouri, the 84-year-old man who shot a black teenager who mistakenly rang his doorbell today pleading not guiltlty. and in upstate new york, a young woman shot and killed when the car she was in made a wrong turn in a driveway. the shooter denied bail. plus, the arrests in the deadly weekend shooting at a sweet 16 party in alabama that injured dozens. the latest on the cases and the state of gun violence in america. also tonight, the airman accused of leaking top secret intelligence documents in court. the blowback on capitol hill. the hearing in congress aboutut unidentified objectsts in the sky. why the pentagon s warning tonight is not about alien life. the severe weather threat across the plains. millions facing high winds and large hail in the middle of the country. our series, climate challenge, the threat facing some endangered gentle giants of the sea, but also signs of hope. and the official end of a bygone era, streaming
World. how often do you see them? rarely. reporter: their numbers peaked at 483 in 2010. today there are fewer than 340. what s the goal of all this? the goal? well, the goal is to conserve the species, not let them go extinct, not let us make them go extinct. reporter: these right whales are huge, up to 65 feet long, the size of a school bus, but they swim very slowly, just six miles an hour. that slow speeds puts them on a potentially deadly collision course with boats carrying all the stuff we order. they migrate 2,000 miles up and down the east coast traveling the same route as cargo ships now bigger and heavier. the whales must also navigate a maze of vertical fishing lines that can entangle them then there s climate change, warming waters impacting their food supply. researcher christy hudak. the right whales