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>> linzie janis reporting tonight, thanks. >>> a new and chilling terror arrest tonight right here in america. this young couple from mississippi, newlyweds captured as they were about to board a plane. they allegedly planned to tell friends and family they were going on their honeymoon but authorities say they had a much different plan and here's abc's steve osunsami. >> reporter: in this high school photo from homecoming court, she doesn't look at all like she's on her way to jihad but tonight federal authorities say 20-year-old jaelyn young confessed, telling them she and her new husband were traveling to joyce isis in syria. just this spring she was studying chemistry at mississippi state. >> i know the kind of person that she is, and this doesn't make any sense. she was so smart, top of her class, studying to be a doctor. >> reporter: authorities say she praise the attack in chattanooga last month where four marines were killed. young and 22-year-old muhammad dakhlalla were arrested, planning to fly delta airlines on to turkey. investigators say from there they planned to slip in

we turn to linzie janis, in new york. >> reporter: good evening. that federal building in lower manhattan houses an immigration court as well as veteran health services. the 68-year-old walking in just after 5:00 p.m., and opening fire, hitting that private security guard in the upper body. we've just learned he did not make it. the gunman then turning the gun on himself. the scene, chaotic. roads are closed, and police are working to clear the area. >> linzie, thank you. >>> next to another developing headline, hurricane danny gathering strength. at this hour, a category three storm. winds up to 115 miles per hour. let's get right to rob marciano, tracking it all. >> this is the strongest storm in this part of the tropics in five years. it will weaken towards the caribbean. they need the rain, so they will take a weakening storm. and tropical storm kilo, in the vicinity of hawaii by tuesday or wednesday of next week. >> and the other storm you're tracking? >> severe weather in the midwest. here's the risk area tomorrow. the front pushing through t

we turn to linzie janis, in new york. >> reporter: good evening. that federal building contains veteran health services. he has been said to be a veteran. and he turned the gun on himself, shooting and killing himself. the security guard, not surviving. the scene described as chaotic, and police still trying to contain it. >> linzie, thank you. >>> next to another developing headline, hurricane danny gathering strength. now the first major hurricane of the atlantic season. at this hour, a category three storm. winds up to 115 miles per hour. we're learning more about the potential track of this hurricane, and also the severe weather this weekend. let's get right to rob marciano, tracking it all. first, the track of this thing. >> this is the strongest storm in this part of the tropics in five years. it will weaken towards the caribbean. it will hit the islands monday, tuesday, wednesday. they need the rain, so they will take a weakening storm. of greater concern to the u.s., the 50th state. tropical storm kilo, in the vicinity of hawaii by tuesday