US Defence Secretary Chuck Hagel has announced plans to bolster US missile defences in response to a growing nuclear threat from North Korea.
14 interceptors will be added to a missile defence site in Alaska by 2017 and a radar tracking station will be deployed in Japan.
"The reason that we're doing what we're doing ... is to not take any chances, is to stay ahead of the threat," Hagel said.
More top news
Indian company Tata Steel have announced that they have completed the sale of their European business - to Greybull Capital.
The new X Factor judging panel has been revealed - and three familiar faces are making a comeback.
The cousin-in-law of Mexican footballer Alan Pulido - kidnapped and rescued over the weekend - is suspected of playing a role.