Nuclearw Weapon News Today

Breaking news from the white house. kristen welker is there. what do we know? >> reporter: we have breaking news. this was expected, president trump announcing the u.s. is moving to impose new sanctions on iran. the pool was just called back into the oval office moments ago. the president, according to this pool note, saying that the trump administration is poised to impose, quote, hard-hitting sanctions on iran. hes going to be signing an executive order to put that process into motion. the ord...

People who were shaped by her classroom experience. >> i want to borrow that, barbara, she left as a negro and came back as an influential political woman. and now we want to check in with alex witt, and what is going on? >> a new reported threat with north korea today. i will talk to bill richardson who just visited that country, and what did he learn with testing in regard to the nuclear w weapon. >> and what you might expect from the aftermath of what happened. and you will hear from the un...