John Hancock Tower E News Today

Effects are this bad, what good can come out of it? >> reporter: questions now facing health officials and millions of kids headed back to school kristen dahlgren, nbc news just ahead tonight, our nbc news exclusive. inside the tsas new warning to travelers that starts today about the new i.d. youll soon need to fly. youll want to see this story also the mystery in the wild caught on camera whats causing these endangered animals to behave so strangely. and 100 years young. the big birthday...

Pregame prayers and calming court side presence made her as popular as any player, inspiring t-shirts, socks, even bobbleheads. >> she is an icon. >> everyone loves sister jean. she lights up any room shes in >> reporter:od made of more than 10,000 plastic bricks. >> we decided to build sister jean because she is an icon in chicago. we kind of hold her up there with the john hancock tower.e to a nun who her community. joe fryer, nbc news. >> a pretty cool gift. and happy birthday, sister jean. t...

Floridas fish and wildlife agency sharing this video of a panther and bobcat struggling to walk, stumbling, then falling. their hind legs virtually useless. >> my best guess is these animals have ingested some type of toxin. >> reporter: authorities have confirmed two cases of neurological damage to these big cats trail cameras show at least nine others, mostly kittens, hobbled with similar symptoms with fewer than 200 florida panthers estimated in the wild, theyre protected by dete ine whats sp...