New missiles can travel about 4,200 miles . Weapons could reach Guam or Alaska bases on Alaska . North Korea has been involved in what is known as the six-party talks with the United States , Japan , Russia , South Korea and China , which is an effort to end the nation 's nuclear program , which the U.S. says is linked to nuclear weapons . Tensions on Stalinist peninsula running high .
New missiles can travel about 4,200 miles . Weapons could reach Guam or Alaska bases on Alaska . Tensions on Stalinist peninsula running high .