and satellite images of a north korean test site show signs of brning, which may be evidence of recent rocket engine tests. ehe moratorium helped pave the ecy for two unprecedented bmmits, but good feelings evaporated over american demands that north korea end its nuclear weapons program before the u.s. would support lifting economic sanctions. former national security adviser john bolton says the administration has been played by the north and should just odmit its policy failed. do you believe it is possible for kim to ever give up this nuclear weapons program? >> potentially this is a decade-long project of getting north korea to t its truly longein the heclr weaps.he poi wse >> reporter: here's what restarting those tests could mean, developing missiles with a range and accuracy to hit the u.s. and working on nuclear dsrheads that, norah, might somi