reporter: and these two u.s. add ver saurys have nuclear weapons. putin has the largest stockpile on the planet. and analysts say he could help kim build up his arsenal. with the sony hack north korea s shown it can and will strike americans where they live. why is kim pivoting toward russia? he s had a fallout with his uncle and south korea. now they re tilting towards russia and that coincides with a russian interest in remindingqua what we can cause trouble if you press too hard on the ukraine. reporter: now the big question is will kim jong-un accept putin s invitation to go to moscow in may for a big celebration for the end of world war ii. the north korean leadership has accepted but it s not clear if kim himself will go. he may be reluctant, because he s ever been outside north
analysts say he could help kim build up his arsenal. with the sony hack north korea has shown it can and will strike americans where they live. why is kim pivoting toward russia? he has had a falling out with his chief ally china because of north corekorea s. now they are tilting toward russia. that coincides with a russian interest in reminding washington we can cause trouble if you press too hard on the ukraine. reporter: now the big question here is will kim jong-un accept putin s invitation to go to moscow in may for a big celebration of the end of world war ii? the russians say the north korean leadership has accepted but it s not clear if kim himself is going to go. analysts say kim may be reluctant because he has never been outside north korea as its leader. there s the possibility of a