- 3 updates
US Defence Secretary Chuck Hagel said plans to bolster the country's missile defences were in response to "irresponsible and reckless provocations" by North Korea, which threatened a preventative nuclear strike against the US last week.
In addition to the 14 new anti-missile interceptors being added at Fort Greely in Alaska, the Pentagon has also left open the possibility of creating a site on the US East Coast where it could field more interceptors capable of striking down an incoming missile.
Hagel told a news conference, "By taking the steps I outlined today we will strengthen our homeland defence, maintain our commitments to our allies and partners, and make clear to the world that the United States stands firm against aggression".
Last week, North Korea issued a threat to stage a pre-emptive nuclear attack against the US as the United Nations readied new sanctions against Pyongyang in response to its nuclear test on February 12.
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.
US Defence Secretary Chuck Hagel will announce later today a plan to boost U.S. missile defences in Alaska to react to any potential threat from North Korea, according to a US defence official.
Hagel is due to speak at 3pm local time, 7pm GMT.