Rocket Disappearing News Today

With the rocket disappearing into a fireball. you can see the crew in the control room just stunned as the rocket failed. the company says its not giving up and will continue its rocket development. still ahead here on "cnn newsroom" this hour, canada hits back at the u.s. for steel and aluminum tariffs, and thats just the beginning of the threatened trade action this week. well follow that story. plus doubts about north koreas pledge to end its nuclear program. what the u.s. national securi...