trump hasn't responded with his twitter account in-kind. there is not an escalation of tension, but a wait-and-see. wait to see if the peace process will go forward. >> shaking it off to brian and saying north korea called me human scum and blood sucker all the way back in 2003. ivan watson live in seoul. breaking news. for the first time we are seeing video from the deadly ambush that killed four american soldiers in niger last fall. we must warn you. that may be difficult to watch. the 23-minute video seen by congress was given to cnn by the pentagon. it contains drone footage of the body of sergeant ladavid johnson retrieved from under the thorn tree. this shows troops who escaped the isis ambush and escaped into a swamp.